Revert to "asterisk 11.10.2"

This reverts commit 2f2d9652792f2dc22835881999f57dab9bede2da.
add missing ast_channel_unlock

The patch was not updated correctly after some upstream modification
added more locking into the remote_bridge_loop function.
remove channel locking around get_codec in remote_bridge_loop

With our patch, a similar lock and check is already done in
safe_rtp_glue_get_codec.
Merge branch 'freeze-ast-11.10.2'
update patches