diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61bf32cb..ec62deb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,20 +7,14 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 ## [Unreleased]
 ### Added
+- jwt: new JSON Web Token (JWT) library (supports for claim exp, iat, nbf, iss, aud).
+
 ### Changed
-- http_network:
-	Integrated changes on SOCKET so that EiffelWeb can be compiled with 16.05 to 17.05 and after.
 ### Deprecated
 ### Removed
 ### Fixed
-- http_client:
-	Improved query and form data encoding (based on a very early version of the general URI percent-encoding rules).
-      - now correct encoding of space by '%20' in path segment, and '+' in query parameters.
-    Unify and fixed query parameters handling for libcurl and net implementation.
-    Fixed file uploading (various issue in libcurl, and net implementation).
-    Fixed form multipart encoding by using correctly the boundary.
-- Code cleaning:
-	Removed many obsolete calls, and added timestamp on EiffelWeb obsolete features to benefit from upcoming improvement on the EiffelStudio Inspector tool.
+- Removed a few obsolete calls.
+- `http_client`: Added support for multiple file in form data. Made clear what is the meaning of `upload_filename`, `upload_data` and `form_data`.
 ### Security
 
 
diff --git a/library/network/http_client/libcurl_http_client-safe.ecf b/library/network/http_client/libcurl_http_client-safe.ecf
index aa49ab70..063f3d4d 100644
--- a/library/network/http_client/libcurl_http_client-safe.ecf
+++ b/library/network/http_client/libcurl_http_client-safe.ecf
@@ -17,6 +17,7 @@
 		<library name="net" location="$ISE_LIBRARY\library\net\net-safe.ecf"/>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri-safe.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_libcurl" location="$|spec\libcurl\" recursive="true"/>
 			<cluster name="default_libcurl" location="$|default\libcurl\"/>
 		</cluster>
diff --git a/library/network/http_client/libcurl_http_client.ecf b/library/network/http_client/libcurl_http_client.ecf
index 7364c2eb..e0a721a7 100644
--- a/library/network/http_client/libcurl_http_client.ecf
+++ b/library/network/http_client/libcurl_http_client.ecf
@@ -17,6 +17,7 @@
 		<library name="net" location="$ISE_LIBRARY\library\net\net.ecf"/>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_libcurl" location="$|spec\libcurl\" recursive="true"/>
 			<cluster name="default_libcurl" location="$|default\libcurl\"/>
 		</cluster>
diff --git a/library/network/http_client/net_http_client-safe.ecf b/library/network/http_client/net_http_client-safe.ecf
index b410b814..ad9e05b2 100644
--- a/library/network/http_client/net_http_client-safe.ecf
+++ b/library/network/http_client/net_http_client-safe.ecf
@@ -26,6 +26,7 @@
 		</library>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri-safe.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_net" location="$|spec\net\">
 				<cluster name="net_implementation" location="$|implementation\" hidden="true"/>
 			</cluster>
diff --git a/library/network/http_client/net_http_client.ecf b/library/network/http_client/net_http_client.ecf
index 30a2e5d2..96723902 100644
--- a/library/network/http_client/net_http_client.ecf
+++ b/library/network/http_client/net_http_client.ecf
@@ -26,6 +26,7 @@
 		</library>
 		<library name="uri" location="$ISE_LIBRARY\library\text\uri\uri.ecf"/>
 		<cluster name="src" location=".\src\">
+			<cluster name="implementation" location="$|implementation" recursive="true" hidden="true"/>
 			<cluster name="spec_net" location="$|spec\net\">
 				<cluster name="net_implementation" location="$|implementation\" hidden="true"/>
 			</cluster>
diff --git a/library/utility/general/error/src/error.e b/library/utility/general/error/src/error.e
index f5231c09..62f8c272 100644
--- a/library/utility/general/error/src/error.e
+++ b/library/utility/general/error/src/error.e
@@ -28,17 +28,17 @@ feature -- Access
 		end
 
 	message: detachable READABLE_STRING_32
-			-- Potential error message
+			-- Potential error message.
 		deferred
 		end
 
 	parent: detachable ERROR
-			-- Eventual error prior to Current
+			-- Eventual error prior to Current.
 
 feature -- String representation
 
 	string_representation: STRING_32
-			-- String representation for Current
+			-- String representation for Current.
 		do
 			create Result.make_from_string (name.as_string_32)
 			Result.append_character (' ')
@@ -62,7 +62,7 @@ feature -- Status report
 feature -- Change
 
 	set_parent (a_parent: like parent)
-			-- Set `parent' to `a_parent'
+			-- Set `parent' to `a_parent'.
 		do
 			parent := a_parent
 		end
@@ -80,7 +80,7 @@ invariant
 	name_attached: name /= Void
 
 note
-	copyright: "2011-2014, Jocelyn Fiat, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/error_group.e b/library/utility/general/error/src/error_group.e
index df101759..749d8d66 100644
--- a/library/utility/general/error/src/error_group.e
+++ b/library/utility/general/error/src/error_group.e
@@ -30,28 +30,24 @@ feature -- Access
 
 	name: STRING
 
-	message: detachable STRING_32
+	message: STRING_32
 		do
 			create Result.make_from_string (name)
-			from
-				sub_errors.start
-			until
-				sub_errors.after
+			across
+				sub_errors as s
 			loop
 				if
-					attached sub_errors.item as e and then
+					attached s.item as e and then
 					attached e.message as m
 				then
-
 					Result.append_character ('%N')
 					Result.append_string (m)
 				end
-				sub_errors.forth
 			end
 		end
 
 	sub_errors: LIST [ERROR]
-			-- Error contained by Current
+			-- Error contained by Current.
 
 feature -- Visitor
 
@@ -61,9 +57,8 @@ feature -- Visitor
 			a_visitor.process_group (Current)
 		end
 
-
 note
-	copyright: "Copyright (c) 1984-2011, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/error_handler.e b/library/utility/general/error/src/error_handler.e
index 9cd9e1de..d0a636be 100644
--- a/library/utility/general/error/src/error_handler.e
+++ b/library/utility/general/error/src/error_handler.e
@@ -1,19 +1,14 @@
 note
-	description : "[
-			Error handler or receiver.
-
-		]"
+	description : "Error handler or receiver."
 	legal: "See notice at end of class."
 	status: "See notice at end of class."
-	date: "$Date: 2015-10-10 00:55:41 +0200 (sam., 10 oct. 2015) $"
-	revision: "$Revision: 97980 $"
+	date: "$Date$"
+	revision: "$Revision$"
 
 class
 	ERROR_HANDLER
 
 inherit
-	ANY
-
 	DEBUG_OUTPUT
 
 create
@@ -46,7 +41,7 @@ feature -- Access
 			-- Optional identifier for Current handler.
 
 	primary_error_code: INTEGER
-			-- Code of first error in `errors'
+			-- Code of first error in `errors'.
 		require
 			at_least_one_error: has_error
 		do
@@ -62,7 +57,7 @@ feature -- Status
 		end
 
 	count: INTEGER
-			-- Number of error
+			-- Number of error.
 		do
 			Result := errors.count
 		end
@@ -83,7 +78,7 @@ feature -- Status
 feature {ERROR_HANDLER, ERROR_VISITOR} -- Restricted access
 
 	errors: LIST [ERROR]
-			-- Errors container
+			-- Errors container.
 
 feature -- Status report
 
@@ -119,12 +114,12 @@ feature -- Status report
 feature -- Events
 
 	error_added_actions: ACTION_SEQUENCE [TUPLE [ERROR]]
-			-- Actions triggered when a new error is added
+			-- Actions triggered when a new error is added.
 
 feature -- Synchronization
 
 	add_synchronization (h: ERROR_HANDLER)
-			-- Add synchronization between `h' and `Current'	
+			-- Add synchronization between `h' and `Current`.
 			--| the same handler can be added more than once
 			--| it will be synchronized only once
 		do
@@ -133,7 +128,7 @@ feature -- Synchronization
 		end
 
 	remove_synchronization (h: ERROR_HANDLER)
-			-- Remove synchronization between `h' and `Current'
+			-- Remove synchronization between `h' and `Current'.
 		do
 			remove_propagation (h)
 			h.remove_propagation (Current)
@@ -347,7 +342,7 @@ feature {NONE} -- Event: implementation
 		end
 
 	on_reset
-			-- `reset' was just called
+			-- `reset' was just called.
 		local
 			sync_list: detachable ARRAYED_LIST [ERROR_HANDLER]
 			lst: detachable LIST [ERROR_HANDLER]
@@ -389,7 +384,7 @@ feature {NONE} -- Event: implementation
 feature -- Basic operation
 
 	add_error (a_error: ERROR)
-			-- Add `a_error' to the stack of error
+			-- Add `a_error' to the stack of error.
 		do
 			errors.force (a_error)
 			on_error_added (a_error)
@@ -406,28 +401,22 @@ feature -- Basic operation
 		end
 
 	add_error_details, add_custom_error (a_code: INTEGER; a_name: STRING; a_message: detachable READABLE_STRING_GENERAL)
-			-- Add custom error to the stack of error
-		local
-			e: ERROR_CUSTOM
+			-- Add custom error to the stack of error.
 		do
-			create e.make (a_code, a_name, a_message)
-			add_error (e)
+			add_error (create {ERROR_CUSTOM}.make (a_code, a_name, a_message))
 		end
 
 	append (other: ERROR_HANDLER)
-			-- Append errors from `a_err_handler'
+			-- Append errors from `a_err_handler'.
 		local
 			other_errs: LIST [ERROR]
 		do
 			other_errs := other.errors
-			if other_errs.count > 0 then
-				from
-					other_errs.start
-				until
-					other_errs.after
+			if other_errs /= errors and then other_errs.count > 0 then
+				across
+					other_errs as e
 				loop
-					add_error (other_errs.item)
-					other_errs.forth
+					add_error (e.item)
 				end
 			end
 		ensure
@@ -435,7 +424,7 @@ feature -- Basic operation
 			new_count: count = old count + other.count
 		end
 
-feature -- Access
+feature -- Conversion
 
 	as_single_error: detachable ERROR
 			-- All error(s) concatenated into one single error.
@@ -465,7 +454,7 @@ feature -- Access
 feature -- Element changes
 
 	concatenate
-			-- Concatenate into a single error if any
+			-- Concatenate into a single error if any.
 		do
 			if count > 1 and then attached as_single_error as e then
 				reset
@@ -516,7 +505,7 @@ invariant
 	propagators_not_empty: attached propagators as lst implies not lst.is_empty
 
 note
-	copyright: "2011-2016, Jocelyn Fiat, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/visitor/error_iterator.e b/library/utility/general/error/src/visitor/error_iterator.e
index 0102544a..10005a5e 100644
--- a/library/utility/general/error/src/visitor/error_iterator.e
+++ b/library/utility/general/error/src/visitor/error_iterator.e
@@ -25,19 +25,16 @@ feature -- Access
 	process_group (g: ERROR_GROUP)
 		do
 			if attached g.sub_errors as err then
-				from
-					err.start
-				until
-					err.after
+				across
+					err as e
 				loop
-					process_error (err.item)
-					err.forth
+					process_error (e.item)
 				end
 			end
 		end
 
 note
-	copyright: "Copyright (c) 1984-2011, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/visitor/file_output_error_visitor.e b/library/utility/general/error/src/visitor/file_output_error_visitor.e
index 49e9493f..e4276d18 100644
--- a/library/utility/general/error/src/visitor/file_output_error_visitor.e
+++ b/library/utility/general/error/src/visitor/file_output_error_visitor.e
@@ -16,7 +16,7 @@ inherit
 create
 	make
 
-feature -- Initialization
+feature {NONE} -- Creation
 
 	make (f: like file)
 		require
@@ -32,7 +32,7 @@ feature -- Access
 feature -- Output
 
 	output_string (a_str: detachable READABLE_STRING_GENERAL)
-			-- Output Unicode string
+			-- Output Unicode string.
 		do
 			if a_str /= Void then
 				to_implement ("Convert into UTF-8 or console encoding before output")
@@ -51,7 +51,7 @@ feature -- Output
 		end
 
 note
-	copyright: "2011-2012, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/visitor/output_error_visitor.e b/library/utility/general/error/src/visitor/output_error_visitor.e
index 50b05b3d..fb574e3b 100644
--- a/library/utility/general/error/src/visitor/output_error_visitor.e
+++ b/library/utility/general/error/src/visitor/output_error_visitor.e
@@ -14,12 +14,12 @@ inherit
 feature -- Output
 
 	output_string (a_str: detachable READABLE_STRING_GENERAL)
-			-- Output Unicode string
+			-- Output Unicode string.
 		deferred
 		end
 
 	output_any (obj: detachable ANY)
-			-- Output Unicode string
+			-- Output Unicode string.
 		do
 			if attached {READABLE_STRING_GENERAL} obj as l_str then
 				to_implement ("Convert into UTF-8 or console encoding before output")
@@ -42,6 +42,7 @@ feature -- Output
 feature -- Process
 
 	process_error (e: ERROR)
+			-- <Precursor>
 		do
 			output_string ({STRING_32}"Error Name: ")
 			output_string (e.name)
@@ -54,6 +55,7 @@ feature -- Process
 		end
 
 	process_custom (e: ERROR_CUSTOM)
+			-- <Precursor>
 		do
 			output_string ({STRING_32}"Error Name: ")
 			output_string (e.name)
@@ -66,22 +68,19 @@ feature -- Process
 		end
 
 	process_group (g: ERROR_GROUP)
+			-- <Precursor>
 		local
 			l_errors: LIST [ERROR]
 		do
-			from
-				l_errors := g.sub_errors
-				l_errors.start
-			until
-				l_errors.after
+			across
+				g.sub_errors as s
 			loop
-				l_errors.item.process (Current)
-				l_errors.forth
+				s.item.process (Current)
 			end
 		end
 
 note
-	copyright: "Copyright (c) 1984-2011, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software
diff --git a/library/utility/general/error/src/visitor/text_output_error_visitor.e b/library/utility/general/error/src/visitor/text_output_error_visitor.e
index b79b1b75..0e565a01 100644
--- a/library/utility/general/error/src/visitor/text_output_error_visitor.e
+++ b/library/utility/general/error/src/visitor/text_output_error_visitor.e
@@ -16,7 +16,7 @@ inherit
 create
 	make
 
-feature -- Initialization
+feature {NONE} -- Creation
 
 	make (buf: like buffer)
 		require
@@ -32,7 +32,7 @@ feature -- Access
 feature -- Output
 
 	output_string (a_str: detachable READABLE_STRING_GENERAL)
-			-- Output Unicode string
+			-- Output Unicode string.
 		do
 			if a_str /= Void then
 				to_implement ("Convert into UTF-8 or console encoding before output")
@@ -51,7 +51,7 @@ feature -- Output
 		end
 
 note
-	copyright: "2011-2012, Eiffel Software and others"
+	copyright: "2011-2017, Jocelyn Fiat, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software