Add ability to specify supported option 'infinity' for LimitNPROC (vo…

…xpupuli#152)

* Add ability to specify supported option 'infinity' for LimitNPROC

From limits.conf(5)
All items support the values -1, unlimited or infinity indicating no limit, except for priority and nice.

* Extend validation to include improved regexp

types/servicelimits.pp

@@ -9,7 +9,7 @@
     Optional['LimitRSS']            => Pattern['^(infinity|((\d+(K|M|G|T|P|E)(:\d+(K|M|G|T|P|E))?)))$'],
     Optional['LimitNOFILE']         => Variant[Integer[-1],Pattern['^(infinity|\d+(:(infinity|\d+))?)$']],
     Optional['LimitAS']             => Pattern['^(infinity|((\d+(K|M|G|T|P|E)(:\d+(K|M|G|T|P|E))?)))$'],
-    Optional['LimitNPROC']          => Integer[1],
+    Optional['LimitNPROC']          => Variant[Integer[-1],Pattern['^(infinity|\d+(:(infinity|\d+))?)$']],
     Optional['LimitMEMLOCK']        => Pattern['^(infinity|((\d+(K|M|G|T|P|E)(:\d+(K|M|G|T|P|E))?)))$'],
     Optional['LimitLOCKS']          => Integer[1],
     Optional['LimitSIGPENDING']     => Integer[1],