Update sample configurations to make virtual hosting more obvious.

(closes issue #11969)
 Reported by: pprindeville
 Patches: 
       acme-virtualpbx.1.6.patch uploaded by pprindeville (license 347)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@110691 65c4cc65-6c06-0410-ace0-fbb531ad65f3