chat-procs overhaul: - don't double encode everything - avoid deprecated js functions escape()/unescape() xowiki/www/ajax/streaming-chat.js, xowiki/www/ajax/scripted-streaming-chat.js - scripted-mode: fix incorrect markup - fix parameter passing to xowiki/www/ajax/chat.tcl to avoid rejects - fix json_encode: one quote to man in xotcl-core/tcl/chat-procs.tcl - don't dropt "user has_entered_the_room" in "xo::Chat instproc login", since xowiki chat has otherwise no idea, who is logged in