Improve style and wording of comments and sysctl descriptions [1].
Improve style and wording of comments and sysctl descriptions [1].

Move machdep.ct_debug to debug.clocktime as there was no reason to
actually put it under machdep in r216340.

Submitted by:	bde [1]
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase