Enhanced p4d_base to start p4d from the P4ROOT directory and to
set 'ulimit -c unlimited' to enable core dumps. Similar was
done for p4p_base and p4broker_base.
For best results, combine this with doing the following as root
on p4d server machines:
bash -c "echo 'core.%e.%p.%s' > /proc/sys/kernel/core_pattern"
This wll generate core files for p4d in $P4ROOT, something like this:
/p4/1/root/core.p4d_1.2351279.11
For p4p, core dumps appear in the $P4PCACHE dir.
For p4broker, core dumps appear in the $LOGS dir.
Also added version identifier that is captured in systemctl status
output.