Issue 245 - Unify SSL configuration for all servers

--HG--
rename : modules/discourse/templates/site.erb => modules/discourse/files/site.conf
rename : modules/downloadserver/files/downloads.adblockplus.org => modules/downloadserver/files/site.conf
rename : modules/filterserver/templates/easylist-downloads.adblockplus.org.erb => modules/filterserver/files/site.conf
rename : modules/nagios/templates/site.erb => modules/nagios/files/site.conf
rename : modules/notificationserver/templates/notification.adblockplus.org.erb => modules/notificationserver/files/site.conf
rename : modules/rietveld/templates/site.erb => modules/rietveld/files/site.conf
rename : modules/statsmaster/files/stats.adblockplus.org => modules/statsmaster/files/site.conf
rename : modules/trac/templates/site.erb => modules/trac/files/site.conf
rename : modules/updateserver/files/update.adblockplus.org => modules/updateserver/files/site.conf
rename : modules/web/templates/site.erb => modules/web/templates/site.conf.erb
Issue 254 - Switch from wildcard certificate to certificates for individual hosts
Issue 254 - Reverted to wildcard certificate for filter servers for now, specific certificate is broken
Issue 254 - Using specific certificate again
Issue 311 -  Switch to a current Ubuntu image for infrastructure testing
Issue 300 - Don't expose nginx version number in headers
Issue 239 - Move AWStats processing to the stats server
Issue 376 - Trac's nginx blocks large file uploads
Issue 239 - ssh class should no longer be instantiated explicitly for the intraforum server
Issue 239 - Fix wrong site name
Issue 239 - Fix wrong host name
Issue 239 - List server10 in known_hosts