fix null/empty string check in ng_call_stats
new command: 'list' to retreive the list of active call-ids
Merge branch 'camilleoudot-co_fix_stats'
version reporting: use git branch and commit if available
split very long log lines into smaller pieces
XMLRPC notifications: more formats

the command line switch -x allows tho choose between several XMLRPC formats:

  * format 0 is the legacy SEMS di for the SBC application
  * format 1 only includes the call-id:

<?xml version="1.0" encoding="UTF-8"?>
<methodCall>
<methodName>teardown</methodName>
<params>
<param><value><string>${call-id}</string></value></param>
</params>
</methodCall>
Merge branch 'camilleoudot-xmlrpc-alternative'
list command: several fixes + documentation

  * duplicate strings when filling the bencode structure
  * limit the number of results to avoid going over the UDP packet
    size limit
Merge branch 'co_list_calls' of github.com:camilleoudot/rtpengine into camilleoudot-co_list_calls
Merge branch 'camilleoudot-co_list_calls'
fix segfault if NG protocol is not used
use default TOS if not using NG protocol
change stun log levels
increase default log level for debug builds
fix TCP/UDP protocol stream output

closes #16
allow for fqdn in o= line
MT8741 remove init script tricks
Update CentOS definitions

Author: mtryfoss

Closes #19
implement delayed call/branch deletion

Squashed commit of the following:

commit 5539a3dcb4657033f35867872d2af1833ca851de
Author: Richard Fuchs <rfuchs@sipwise.com>
Date:   Wed Aug 27 08:02:00 2014 -0400

    update redis mod version

commit fa372760a2663b11352edf61de7ab0ba4d2c8fb7
Author: Richard Fuchs <rfuchs@sipwise.com>
Date:   Tue Aug 26 15:42:00 2014 -0400

    delay branch deletion

commit 87af9f48f532d9a17aa69413b53a143665cb6d95
Author: Richard Fuchs <rfuchs@sipwise.com>
Date:   Tue Aug 26 13:52:28 2014 -0400

    delay deletion of entire call
support sdes key change in simulations