odd problem in qa/255 for UNIX domain socket for pmcd

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

Extra line in output ...

264a267
> [DATE] pmcd(PID) Error: pmcd: can't unlink /var/run/pcp/pmcd.$DSO_SUFFIXcket 
> (uid=999,euid=999): Permission denied

This looks like a permissions problem (the msg is mangled by the filter turning 
so -> $SO_SUFFIX).

pmcd is running as pcp at this point, so it is never going to be able to remove 
pmcd.socket setup like this

kenj@bozo-laptop:~/src/pcp/qa$ ls -ld /var/run/pcp
drwxr-xr-x 2 root root 80 Jul 19 20:27 /var/run/pcp
kenj@bozo-laptop:~/src/pcp/qa$ ls -l /var/run/pcp
total 4
-rw-r--r-- 1 root root 5 Jul 19 20:27 pmcd.pid
srw-rw-rw- 1 root root 0 Jul 19 20:27 pmcd.socket