Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

back Xref get_cyclecount to have it get more exposure...

use .Mt to mark up email addresses consistently (part6)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

Document the sbinuptime() and getsbinuptime() functions introduced in
r247452.

Sponsored by: DARPA, AFRL

Scheduled mdoc(7) sweep.

Bring kernel time variable and access function docs up to date by
updating the list of variables and mentioning the bin(up)time functions.

mdoc(7) police: Use the new .In macro for #include statements.

mdoc(7) police: removed HISTORY info from the .Os call.

Remove references to the defunct kern.timecounter.method sysctl variable.

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Add new manpages for:
microtime(9)
nanotime(9)
getmicrotime(9)
getnanotime(9)
microuptime(9)
nanouptime(9)
getmicrouptime(9)
getnanouptime(9)
tvtohz(9)

Based on PR: docs/15889
Submitted by: Kelly Yancey <kbyanc@posi.net>