chan_woomera.c
======================================
 Dec 19 2008
 * v1.39 David Yat Sin <dyatsin@sangoma.com>
 * 	Support for Asterisk 1.6
 
 Dec 05 2008
 * v1.38 David Yat Sin <dyatsin@sangoma.com>
 *	Support for fax_detect using Asterisk software DSP
 
 Nov 26 2008
 * v1.37 Nenad Corbic <ncorbic@sangoma.com>
 *	Bug Fix: tech_read try again now checks for hangup
 
 Oct 14 2008
 * v1.36 David Yat Sin <dyatsin@sangoma.com>
 *  Bug Fix: Call hangup on call park

 Jul 23 2008
 * v1.35 Nenad Corbic <ncorbic@sangoma.com>
 *  Bug Fix: Check for cid_name.
 
 Jul 23 2008
 * v1.34 Nenad Corbic <ncorbic@sangoma.com>
 *  Added udp tagging and rx/tx sync options for
 *	voice streams debugging. Not for production.
 
 Jul 18 2008
 * v1.33 Nenad Corbic <ncorbic@sangoma.com>
 *	Added UDP Sequencing to check for dropped frames
 *	Should only be used for debugging.

 Jun 3 2008
 * v1.32 David Yat Sin <davidy@sangoma.com>
 *      Updated for callweaver v1.2.0
 
 Jun 2 2008
 * v1.31 Nenad Corbic <ncorbic@sangoma.com>
 * v1.30 Nenad Corbic <ncorbic@sangoma.com>
 *      Added AST_CTONROL_RING event on outgoing call.
 *     Updated for CallWeaver 1.2 SVN
	  
 May 21 2008
 * v1.30 David Yat Sin <davidy@sangoma.com>
 *	Fix for compilation issues with Callweaver v1.2-rc5 

 Apr 30 2008
 * v1.29 David Yat Sin <davidy@sangoma.com>
 *	Added AST_CONTROL_SRCUPDATE in tech_indicate
 

 Apr 29 2008
 * v1.28 David Yat Sin <davidy@sangoma.com>
 *	Fix for compilation issues with Callweaver v1.99
 *

 Feb 13 2008
 * v1.27 David Yat Sin <davidy@sangoma.com>
 *     Fixed issue channel type not defined when calling tech_call 
 *

 Feb 13 2008
 * v1.26 Nenad Corbic <ncorbic@sangoma.com>
 *      Compilation Update for callweaver 1.2-rc5
 *

 Feb 06 2008
* v1.25 Nenad Corbic <ncorbic@sangoma.com>
 *      Bug fix in woomera message declaration
 *      Possible memory overflow
 *

 Jan 23 2008
 * v1.24 Nenad Corbic <ncorbic@sangoma.com>
 *	Removed LISTEN on every woomera channel. Listen
 *      only on master. Fixed jitterbuffer support on AST1.4
 *

 Jan 22 2008
 * v1.23 Nenad Corbic <ncorbic@sangoma.com>
 *	Implemented Music on Hold.
 *

 Jan 11 2008
 * v1.22 David Yat Sin <davidy@sangoma.com>
 * 	rxgain and txgain configuration parameters 
 *	are ignored if coding is not specified in 
 *	woomera.conf	

Dec 27 2007
 * v1.21 David Yat Sin <davidy@sangoma.com>
 * 	 Support for language

Dec 20 2007
 * v1.20 David Yat Sin <davidy@sangoma.com>
 *	 Support for call confirmation
 * 	 Support for default context

Nov 30 2007
 * v1.19 Nenad Corbic <ncorbic@sangoma.com>
 *       Updated for latest CallWeaver
 *	 Updated smgversion update on master socket 
 *       restart.

Nov 22 2007

 * v1.18 Nenad Corbic <ncorbic@sangoma.com>
 *       Updated Channel-Name on outbound call
 *       Check queued events on ABORT
 *       Major Unit Testing done
 *       Ability to change chan name from Makefile
 *
 * v1.17 Nenad Corbic <ncorbic@sangoma.com>
 *       Updates for Asterisk 1.4
 *       Updated the release causes
 *       Updated for tech_indication
 *       
 * v1.16 Nenad Corbic <ncorbic@sangoma.com>
 *       Added support for Asterisk 1.4
 *       Updated support for Callweaver
 *
 * v1.15 Nenad Corbic <ncorbic@sangoma.com>
 *       Added PRI_CAUSE and Q931-Cause-Code 
 *       in woomera protocol.
 *
 * v1.14 Nenad Corbic <ncorbic@sangoma.com>
 *       Updated for session support
 *
 * v1.13 Nenad Corbic <ncorbic@sangoma.com>
 *       Added CallWeaver Support
 *       |->(thanks to Andre Schwaller)
 *       Updated codec negotiation for 
 *       mutliple profiles.
 *
 * v1.12 Nenad Corbic <ncorbic@sangoma.com>
 *       Updated DTMF locking
 *
 * v1.11 Nenad Corbic <ncorbic@sangoma.com>
 *       Updated multiple profiles 
 *       Updated Dialect for OPAL Woomera
 *       Added call logging/debugging
 *
 * v1.10 Nenad Corbic <ncorbic@sangoma.com>
 *       Bug fix in incoming hangup 
 * 
 * v1.9 Nenad Corbic <ncorbic@sangoma.com>
 *      Fixed remote asterisk/woomera
 *      setup.
 *
 * v1.8 Nenad Corbic <ncorbic@sangoma.com>
 *      Added Woomera OPAL dialect.
 *      Code cleanup.
 *      Added cli call_status
 *
 * v1.7 Nenad Corbic <ncorbic@sangoma.com>
 *      Added smgdebug to enable smg debugging
 *      Added rdnis
 *
 * v1.6 Nenad Corbic <ncorbic@sangoma.com>
 *      Added incoming trunk group context 
 *      The trunk number will be added to the
 *      profile context name. 
 *      Added presentation feature.
 *
 * v1.5 Nenad Corbic <ncorbic@sangoma.com>
 *      Use only ALAW and MLAW not SLIN.
 *      This reduces the load quite a bit.
 *      Autodetect Format from HELLO Message.
 *      RxTx Gain supported in woomera.conf as well
 *      from CLI.

