Merged patch from Sotiris Tsimbonis <stsimb@irc.gr> with minor changes.

Merged patch from Sotiris Tsimbonis <redacted> with minor changes.
Adds a -c command line argument which tells bopm to use a different name
for log, pid and config files.  i.e. ./bopm -c myserver will use
myserver.conf, myserver.log, myserver.pid.

The patch also makes bopm set umode -h on itself after opering, in order
to prevent the bot appearing in /stats p output (shows opers available to
help).

bopchecker now takes the -c option also, in the same way as bopm.