Fixing some problems/issues with http-bind. Adding some kind of http-prebinding.
See docs/http_prebind_example.php how it can prebind a session.
Here are still probably many bugs. So for testing purpose only.
	modified:   c2s/c2s.h
	modified:   c2s/c2s_http.c
	modified:   c2s/main.c
	new file:   docs/http_prebind_example.php
	modified:   etc/c2s.xml.dist.in