confbridge: Add flags column to CLI "confbridge list <conference>"

* Added the following flags to the CLI "confbridge list <conference>" output:
A - The user is an admin
M - The user is a marked user
W - The user must wait for a marked user to join
E - The user will be kicked after the last marked user leaves the conference
w - The user is waiting for a marked user to join

* Added the following header to the AMI ConfbridgeList events:
WaitMarked, EndMarked, and Waiting.

(closes issue AST-1101)
Reported by: John Bigelow
Patches:
      confbridge-show-admin3.txt (license #5091) patch uploaded by John Bigelow
      Modified


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@381644 f38db490-d61c-443f-a65b-d21fe96a405b
PRESENCE_STATE: Provide better documentation for the 'e' option.

Notes that the 'e' option actually decodes data when used as a write function
such as with the SET application while it encodes data when used to read.

Review: https://reviewboard.asterisk.org/r/2335/
........

Merged revisions 381655 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@381656 f38db490-d61c-443f-a65b-d21fe96a405b