NotSerilizableSecurityContext -> NonSerializableSecurityContext
Convenience overload of impersonate taking a thunk.
Support skips with hash syntax.
hudson.scheduler.BaseParser.hash=true by default: @daily should not necessarily mean 12:00 AM.
Merge branch 'master' into cron-hash-JENKINS-17311
Merge branch 'master' into cron-hash-JENKINS-17311
Promote use of crontab hashes in documentation and form validation.
creating an RC branch
the trunk is toward 1.509-SNAPSHOT
Aligned Traditional Chinese with commit
5537213fcfc35db007e4e20e6c64fc777a61bc19.
Aligned Traditional Chinese with commit
f6a2f64bd612e4f0a964cd966c4acf6939bcac90.　
Aligned Traditional Chinese translations with commit
d8b29df3558724090efaf18326937075c25ba7f3.　
Aligned Traditional Chinese translation with commit
aa432839420fc0d8f07420b63a03daee5bbe49b2.　
Merge branch 'master' into ACL.impersonate
@since up in the air.
merging this toward 1.509
introduced a constant since H/1 really doesn't mean H.
minor touch-up and documentation

as I was playing with it to understand what those logics mean.
[JENKINS-17337] Added test for NPE.
marking the release