added use of URL-encoder to unencode the URL values (to fill the parameters)

review design of GW_RESPONSE to hide the output, and remove the header attribute
added script_url in REQUEST to help the user build url relative to script_name

+ cosmetic

library/server/ewsgi/ewsgi-safe.ecf

@@ -13,6 +13,7 @@
 		<library name="time" location="$ISE_LIBRARY\library\time\time-safe.ecf"/>
 		<library name="error" location="..\..\error\error-safe.ecf"/>
 		<library name="http" location="..\..\protocol\http\http-safe.ecf"/>
+		<library name="encoder" location="..\..\text\encoder\encoder-safe.ecf" readonly="false"/>
 		<cluster name="interface" location="src\" recursive="true"/>
 	</target>
 </system>