2933 compiler warning gags need better granularity
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

6864230 hiho, hiho, it'ch chtime for CH to go
Portions contributed by Rich Lowe

6683064 check_rtime could do with some spring cleaning

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