Linking to debian apache site config more like debian

Ubuntu/Debian users expect symlinks in sites-enabled to
point at config files in sites-available.  This simple
change keeps site configs for Redhat and Ubuntu where
users expect to find them.

Change-Id: I3e0ec12e3817b16c40a51da9dd45a4f3813cc545
Merge "Linking to debian apache site config more like debian"