Config/Apache: misc fixes (Proxy, Headers, Logs)
Config/Apache: misc fixes (Proxy, Headers, Logs)

Several fixes for the sample Apache config rapidconnect.conf
* Exclude Shibboleth-SP URLs from the ProxyPass directive
* Remove erroneous /idp from ProxyPass target
* Add ShibUseHeaders On as needed by unicorn behind HTTP proxy
* Rename log files from groups_* to rapid_* (copy-edit?)

ausaccessfed/rapidconnect,University-of-Auckland/rapidconnect,University-of-Auckland/rapidconnect,ausaccessfed/rapidconnect,ausaccessfed/rapidconnect,University-of-Auckland/rapidconnect,University-of-Auckland/rapidconnect,ausaccessfed/rapidconnect