Anubis / Xlib

Add site UID for website. This is use by cookie session state
improve cookies

Add Tegamigawa constants

CXM_making_a_web_site.anubis:
Add partial_content function without any HTML_Head_Tag

CXM_multihost_http_server.anubis:
Fix etag as quoted string in multihost_http_server.
When file is missing, now return 404 error instead of nothing
Add http_direct_handler, to be able to call a website from another way than
internal webserver listener

…ly replace alert by should_not_happen and "connect to file" by file
Remove obsolete file CXM_html.anubis

…ybe($SessionTicket, Maybe($Sate), List(HTTP_header))

…ybe($SessionTicket, Maybe($Sate), List(HTTP_header))