PSJIP - sip.conf to res_sip.conf script

** This script is in no way finished.

Started the initial "cut" at converting a sip.conf file to a res_sip.conf file.
Hopefully the bulk of the framework is in place and only a few minor adjustments
need to be made when an option mapping is added that "doesn't fit".  This script
and supporting files should be executable against python version 2.5.

An OrderedDict class (backported from a newer version of python) is included.
A MultiOrderedDict class is implemented so options, when added, should be able
to be added in order and allowed to have multiple values.

Currently the scripts supports the majority of endpoint options found in
res_sip.conf.  Support has also been added for Aor(s) and the ACL/security
sections.  Inside the sip_to_res_sip.py file one can see a list of options
that still need to be mapped.

Also items that still need to be done: templates, includes, parsing '=>'
delimiter.  Note that some code is hopefully in place already to support
templates (e.g. lookup/retrieving defaults from them).  However, the
parsing of and adding of the section needs to be done.


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@394024 f38db490-d61c-443f-a65b-d21fe96a405b