[Serusers] New route graph utility

[Nils Ohlmeier]

Hello,

in case you are not following the CVS commit log messages: I just checked in a 
small python script which should be able to print a dependency graph in ASCII 
of the route blocks of a SER config file.

When you try to understand more complex configuration files this tool might be 
helpfull. But be warned: this is still alpha code!
It will not eat your config file, but the output might not meet your 
expectations :-)

If you run it with the default configuration file the output will look like 
this:

./route_graph.py ../../etc/ser.cfg

Main
|
\- 1
|
\- 1
|
\- 1
|
\- 1

A more complex scenario (from a config with named routes) could look like 
this:

./route_graph.py ./ser.cfg

Main
|
\- ROUTE_RPC
|  |
|  \- ROUTE_ERROR_REPLY
|
\- ROUTE_PROXYINIT
|  |
|  \- ROUTE_ERROR_REPLY
|
\- ROUTE_INDIALOG
|  |
|  \- ROUTE_ERROR_REPLY
|  |
|  \- ROUTE_ST
|  |
|  \- ROUTE_FORWARD
|  |  |
|  |  \- ROUTE_LI
|  |  |
|  |  \- ROUTE_RTPPROXY
|  |  |
|  |  \- ROUTE_RR
|
\- ROUTE_DOMAINPOLICY
|  |
|  \- ROUTE_ERROR_REPLY
|
\- ROUTE_REGISTRAR
|  |
|  \- ROUTE_ERROR_REPLY
|
\- ROUTE_AUTHENTICATION
|  |

[... omitted bigger parts...]

Send routes
-----------

onsend

Failure routes
--------------

FAILURE_ROUTE
|
\- ROUTE_RTPPROXY
|
\- ROUTE_VOICEMAIL
|  |
|  \- ROUTE_SEMS
|  |  |
|  |  \- ROUTE_LI
|  |  |
|  |  \- ROUTE_RR
|  |
|  \- ROUTE_ERROR_REPLY
|

[... omitted bigger parts...]

Onreply routes
--------------

REPLY_ROUTE


Feedback is welcome. Patches even more! :-)

Greetings
  Nils