1129817 - prepend process id and thread id if line is split

By including a unique identifier, it is possible to separate logs that are generated at the same time.

 [Bugzilla-1129817](https://bugzilla.redhat.com/show_bug.cgi?id=1129817)
This code could get called before any threads are split off, which could cause the tid to be incorrect when the handler is used later. I would recommend moving this line somewhere in the handling methods, and make sure it only gets called when it's needed (i.e., a message is getting split).