- Add new port sysutils/pstacku using libunwind and written by kib.
- Add CONFLICTS with sysutils/pstack.
"pstack" is a workalike for the Solaris program of the same name.
Running pstack on a process produces a stack trace of
each thread in that process.
It's useful for finding out what wedged processes are up to, getting
profiles of applications, and just satisfying one's curiosity.