https proxy support contingest on openssl installation
if not installed and https use is enabled, a warning is printed
tests: updated tests to skip if openssl not installed
(make https post to only run in 2.7, as there are issues with in 2.6)
will run (this was cumbersome to maintain and not really useful)
ReferRedirect just checks that the current request host header, if present, matches that of the referrer
and checks that the coll and script name match.
* removed proxy_pac as it was also unneeded/unused and required use of the hostpaths
* added test for invalid CONNECT usage (405 response)
