Fix grammar in mount message.

Fixes #2938
(cherry picked from commit 2f5027ad150a4a2077e9062f312dc376e661d2a8)
Report state of agent only in verbose mode.

Fixes #2821
(cherry picked from commit f1c6dffdda342bb4ddfe93edfa49633f0b455a22)
Call tchdboptimize only in 1% of the OpenTokyoDatabase() calls

Even though we call non-reentrant rand() from multiple thread contexts,
there is no harm done even if bad random numbers are returned.
(cherry picked from commit 3d95e9226cd0a38d077333d0cdec4ae85d6a0d0d)
Pre-release version bump
Post-release version bump