Jain SIP 1.2

Hi!

Here are few remarks about the last release of jain sip :

- There is a regression in Utils.generateBranchId : it does not generate 
'globally unique identifier' anymore. The old version does. Maybe you 
should roll back to this one.
The mistake certainly comes from replacing '*' by '+' decreasing the 
range of possible values and so increasing the risk of collision.

- Can't you 'really' integrate a logger (Log4j or java Logging) into the 
stack ? I mean removing the ServerLog and LogWriter classes and assign a 
Logger to each class which needs one. This would permit to properly 
configure stack logging.

Thanks for your job!

Sebastien