- (WGI|WSF)_RESPONSE(*) renamed write_headers_string as write_header_text

- HTTP_HEADER.string does not have the ending CRLFCRLF .. but just CRLF
- WGI_RESPONSE.write_header_text has the responsibility to handle the last blank line CRLF (separating the header from the message)
- HTTP_HEADER.string does not set anymore a default content type as text/html
- added WGI_RESPONSE.write_header_lines (ITERABLE [TUPLE [name,value: READABLE_STRING_8]] mainly as an helper method,
   this way the WGI user does not have to know about the CRLF end of line

draft/library/server/request/rest/src/contrib/doc/html/html_page.e

@@ -158,7 +158,7 @@ feature -- Output
 	send (buf: WSF_RESPONSE)
 		do
 			buf.set_status_code (200)
-			buf.write_headers_string (header_string)
+			buf.write_header_text (header_string)
 			buf.write_string (message_string)
 		end
 

draft/library/server/request/rest/src/response/rest_response.e

@@ -133,7 +133,7 @@ feature -- Output
 		do
 			compute
 			res.set_status_code (200)
-			res.write_headers_string (headers_string)
+			res.write_header_text (headers_string)
 			if attached message as m then
 				res.write_string (m)
 			end

draft/library/server/request/rest/tests/src/app/app_account_verify_credential.e

@@ -88,7 +88,7 @@ feature -- Execution
 					end
 					if not s.is_empty then
 						res.set_status_code ({HTTP_STATUS_CODE}.ok)
-						res.write_headers_string (h.string)
+						res.write_header_text (h.string)
 						res.write_string (s)
 					end
 				else

draft/library/server/request/rest/tests/src/app/app_test.e

@@ -80,7 +80,7 @@ feature -- Execution
 			end
 
 			res.set_status_code (200)
-			res.write_headers_string (h.string)
+			res.write_header_text (h.string)
 			res.write_string (s)
 		end
 

draft/library/server/request/rest/tests/src/app_server.e

@@ -92,7 +92,7 @@ feature -- Execution
 			s.append ("You are being redirected to <a href=%"" + l_redir_url + "%">/doc</a> in 2 seconds ...%N")
 			h.put_content_length (s.count)
 			res.set_status_code ({HTTP_STATUS_CODE}.temp_redirect)
-			res.write_headers_string (h.string)
+			res.write_header_text (h.string)
 			res.write_string (s)
 		end