FreeSWITCH-FS-7269

This patch adds 2 important variables to the originate subsystem

originate_retries:
		This variable controls how many times the system should retry the
		entire dialstring before exiting on failure (default 1)

originate_retry_sleep_ms: 
		This variable controls how long in milliseconds to pause between 
		retries (default 1000)

*NOTE*	when using the , and & symbols to call sequential or simultaneous channels in conjunction with this feature,
	the *entire* dialstring will be repeated as many times as you specify in ${originate_retries}

Here is an example using the bridge application to originate the call. (The feature will also work anywhere else 
an origination can be made.)

<extension name="1000">
  <condition field="destination_number" expression="^1000$">
    <action application="set" data="originate_retries=10"/>
    <action application="set" data="originate_retry_sleep_ms=1000"/>
    <action application="bridge" data="sofia/$${domain}/1000@somehost.com"/>
  </condition>
</extension>





git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4776 d0543943-73ff-0310-b7d9-9358b9ac24b2