Cleanup core main on exit.

Cleanup core main on exit.

* Cleanup time zones on exit.

* Make exit clean/unclean report consistent for AMI and CLI in
really_quit().

(issue ASTERISK-20649)
Reported by: Corey Farrell
Patches:
      core-cleanup-1_8-10.patch (license #5909) patch uploaded by Corey Farrell
      core-cleanup-11-trunk.patch (license #5909) patch uploaded by Corey Farrell
      Modified
........

Merged revisions 377135 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 377136 from http://svn.asterisk.org/svn/asterisk/branches/10

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@377137 65c4cc65-6c06-0410-ace0-fbb531ad65f3