Feature request: include database process id in log messages

[GoogleCodeExporter]

It would be a lot easier to correlate messages that log4jdbc writes with 
information available from the database itself if log4jdbc included in its 
messages the process identifier used by the database.

One application of this feature would be to diagnose deadlocks. SQL Server will 
report the process identifiers of the processes involved in a deadlock, and 
log4jdbc reports statements executed, but there currently is no way to 
correlate the two.

Original issue reported on code.google.com by [email protected] on 12 Dec 2013 at 4:31