Smartos/Solaris/Illumos `/usr/bin/uptime` format
/usr/bin/uptime
on SmartOS (probably also Illumos, maybe Solaris?) adds parens after "day", breaking uptime parsing
hamilton 59 $ /usr/bin/uptime
15:21:04 up 63 day(s), 21 hr(s), 1 user, load average: 0.43, 0.32, 0.35
This causes the pid file to be ignored essentially always, and thus prevents properly stopping amavisd.
Presumably the regex can have some optional crap added to make this transparent.