switch_channel: When in a dialplan hunt and we have a custom caller_profile, ${destination_number} and other variable kept the previous value of the original dialplan parsing.  This correct this so it take the custom created caller_profile for that hunt

mod_protovm: Add premitive tone playback before recording.  Need to make this optional and configurable

mod_callcenter: More changes to be more friendly/compliant/respectful with loopback channels.  Brought to you by François Delawarde

mod_protovm: Add Message Forwarding Capability (Require a mod_voicemail patch that will follow in the near future)

FS-3394 --resolve edge case in the 3rd party sofia sip stack library when dealing with a malformed contact and missing ack. Will push upstream to sofia devs

only parse messages from channel_ready when its a session calling channel ready on itself not when another thread calls it

For complete putenv()-like behaviour.

Further investigation on why putenv() caused EFAULTs on execve() and
segfaults on reload:

putenv(3):

   "The string pointed to by string becomes part of the environment,
    so altering the string changes the environment."

setenv(3):

   "This function makes copies of the strings pointed to by name and value
    (by contrast with putenv(3))."
Signed-off-by: Stefan Knoblich <s.knoblich@axsentis.de>