[packages/postgrey] fixed pidfile header (used by systemd), do not wrap with daemon() - these date back to initial commi

[Tomasz Pala]

On Tue, Aug 07, 2018 at 14:05:46 +0200, Arkadiusz Miśkiewicz wrote:

>> >>   do not wrap with daemon()
[...]
> daemon() in rc-scripts doesn't do any deamonization (unless additional options 
> are specified). It's just a wrapper to nicely do all additional jobs.

OK, reverted this part - I had problems running postgrey under systemd
SysV fallback, I hope this wrapping doesn't break things.

-- 
Tomasz Pala <gotar at pld-linux.org>