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

Fix a bunch of "xref refers to *this* page" igor(1) warnings.

MFC after: 1 month

Create man page for pmap_quick_enter_page(9) and pmap_quick_remove_page(9)

Reviewed by: kib, brueffer, wblock
Approved by: kib (mentor)
Differential Revision: https://reviews.freebsd.org/D3312

Retire pmap_change_wiring(). We have never used it to wire virtual pages.
We continue to use pmap_enter() for that. For unwiring virtual pages, we
now use pmap_unwire(), which unwires a range of virtual addresses instead
of a single virtual page.

Sponsored by: EMC / Isilon Storage Division

Remove an obsolete man page.

Add a man page for the new function pmap_unwire().

Remove the man page for a pmap function that no longer exists.

Correct the name of the man page for pmap_ts_referenced().

Sponsored by: EMC / Isilon Storage Division

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

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

The function pmap_addr_hint no longer exists. Remove its man page.

Add a cross-reference to the pmap_page_init(9) manual page.

Approved by: re

Fixed the .Os call (missing or wrong).

Slightly improve the markup.

Sort SEE ALSO references (in dictionary order, ignoring case).

Fix another typo.

Fix typo.

Update cross-references.

Add pmap_wired_count() and pmap_resident_count() to the pmap documentation.

Discussed with: peter

Update the pmap(9) documentation to reflect the movement of pmap_prefault()
to the machine-independent VM layer, as per alc's recent commit.
Add a definition for the new pmap_is_prefaultable() helper function.

Add manual page documentation for the machine-independent PMAP subsystem.
Include documentation of alc's new pmap_extract_and_hold() function.

Reviewed by: hmp
Approved by: jake (mentor)