mod_commands: Fix user_data returning the first value found instead of the last.  Also add support to get variable from the group.

fix things.

with some machines, which seem to send them when no operator is around.

Fix for T.38 gateway not kicking off or ending transmission under certain
timing conditions.

mod_callcenter: Alot of cleanup.  Added max-wait-time and max-wait-time-with-no-agent param to a queue.

max-wait-time : allow to make the caller quit the queue after X number of waited second.  The second one allow
max-wait-time-with-no-agent : This will wait for a range of second with no agent before kicking the member out of the queue.  This allow safe shift change with all agents login out and back in

I've changed the Event value from CC-Name to either CC-Agent or CC-Queue.  So watchout for your current event socket apps.  Sorry about this change.

Lot to be tested in this commit.  Please use Jira to post problems, and new feature request can be added at the bottom of the wiki page.

- enhance conf/skinny_profiles/internal.xml
- Sanity checks
  + softKeySet id < 16
  + less than 16 buttons per softKeySet
  + at least the default soft-key-set to load the profile
  + at least one profile to load mod_skinny
- Lower some ERRORs to WARNINGs as they don't prevent module loading
- Default skinny_str2soft_key_event to 0