minor init script fix

Good Afternoon,

I almost feel embarrassed submitting this however figured I may as well.
It's just a fix to the status option of the init script shipped in the
rpm version (8.2.6 RHEL5). Hopefully it's ok to submit it directly to
this list, apologies if not.

The status option of the init script doesn't work on a per postmaster
basis, it simply tests that a postmaster process is running. So if one
is running multiple postmasters configured via /etc/sysconfig/pgsql/xxx
files, it can cause confusion (or bigger issues if combined with
something like redhat cluster suite). The fix simply tests for the
specific postmaster process. Thanks.

<<postgresql.init.status_fix.diff>>

Kind regards,
James Tucker | Systems Engineer - Australia | Transaction Network
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