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

Revert r286236; vgonel() is a static function.

Sponsored by: The FreeBSD Foundation

Document vgonel(9).

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

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

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

Stop documenting vgonel() after its converting to the static function:
svn r147332 (by jeff): "Don't make vgonel() globally visible".
While here, specify the vnode locking scheme for vgone().

Discussed on: freebsd-hackers@
Approved by: kib (mentor)
MFC after: 10 days

Minor grammar fixup.

Catch up with the rename of symbol VDOOMED to VI_DOOMED in revision
1.198 of "sys/sys/vnode.h". Remove a cross-reference to a manual
page that never existed.

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Use 'manual page' instead of 'man page' for consistency.

Approved by: re (hrs)

Uniformly refer to a file system as "file system".

Approved by: re

mdoc(7) police: markup, grammar and spelling nits.

Reviewed by: davidc

Add manpages describing various vfs and vm APIs.

Submitted by: Chad David <davidc@acns.ab.ca>