Fix the analog dial *0 flash-hook of bridged peer feature.

Fix the analog dial *0 flash-hook of bridged peer feature.

The flash-hook the bridged peer feature now correctly determines if the
bridged peer is another chan_dahdi channel, that it is an analog channel,
and that it has the correct signaling for an FXO port.  It now also
flash-hooks the correct channel.
........

Merged revisions 370900 from http://svn.asterisk.org/svn/asterisk/branches/1.8

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@370901 65c4cc65-6c06-0410-ace0-fbb531ad65f3