reStructure'ized the old Trac faq and sorted the stuff into their temporary sections. Deleted old-faq.rst from filesystem and updated the index.rst. Now it's time to qualitycheck the content and remove old examples and outdated info.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4789 d4fa192b-c00b-0410-8231-f00ffab90ce4