Add bridge related dial flags to the bridge app

Most of the functionality here is gained simply by setting the feature flag
on the bridge config. However, the dial limit functionality has been moved from
app_dial to the features code and has been made public so both app_dial and
the bridge app can use it.

(closes issue #13165)
Reported by: tim_ringenbach
Patches:
      app_bridge_options_r138998.diff uploaded by tim ringenbach (license 540),
      modified by me


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@220344 65c4cc65-6c06-0410-ace0-fbb531ad65f3