FreeBSD/src 2eb5610 (r339373, r339374)src ck_epoch.c

Import CK as of commit 5221ae2f3722a78c7fc41e47069ad94983d3bccb.
This fixes two problems, one where epoch calls could occur before all
the readers had exited the epoch section, and one where the epoch calls
could be unnecessarily delayed.
DeltaFile
+36-8src/ck_epoch.c
+36-81 files

UnifiedSplitRaw