[peruser] peruser coredump patch

[Brock Noland]

> > There are lots of segfaults, but there is no dump.

> try ulimit -c 4444444444444 before starting httpd

Yep, you have to set ulimit size. I set ulimit -c unlimited before
running apachectl. Its also work noting:

The core dump directory must be writable by the users running apache.

The core dumps for my version of apache are ~4MB so these can take up
a lot of space, fast.

Brock