Add's two features to confbridge: confbridge kick, and confbridge list.

(closes issue #14389)
(closes issue #18007)
Reported by: jcollie
Patches:
      0001-Fix-up-bridging-module-so-that-menuselect-works.patch uploaded by jcollie (license 412)
      0002-Add-confbridge-list-and-confbridge-kick-CLI-comm.patch uploaded by jcollie (license 412)
Tested by: file

Review: https://reviewboard.asterisk.org/r/1084/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@305433 65c4cc65-6c06-0410-ace0-fbb531ad65f3