MFC r337236:
Some updates to vm_map(9).

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

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

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

vm_map_clean() was long ago renamed to vm_map_sync(). Also, it no longer
acquires Giant.

MFC after: 1 week

Remove manual pages for functions that no longer exist.

MFC after: 1 week

Usermode portion of the support for swap allocation accounting:
- update for getrlimit(2) manpage;
- support for setting RLIMIT_SWAP in login class;
- addition to the limits(1) and sh and csh limit-setting builtins;
- tuning(7) documentation on the sysctls controlling overcommit.

In collaboration with: pho
Reviewed by: alc
Approved by: re (kensmith)

Add a missing verb in describing MAP_PREFAULT_MADVISE.

Eliminate macro calls inside literal displays.

Scheduled mdoc(7) sweep.

Add cross references to vm_map_entry_resize_free.9.

Submitted by: Mark W. Krentel

Document the flags field.

Submitted by: Mark W. Krentel

Update to reflect recent changes such as the fields for O(log n) address
space allocation.

Submitted by: Mark W. Krentel

Fixed the .Os call (missing or wrong).

mdoc(7) fixes.

Mdoc Janitor:

* Uppercase the .Dt command contents.

* Remove incorrect usage of .Fa.

* Use .Va for struct members, and .Vt for structs
(correct replacement for .Fa)

* Markup VM_* and MAP_* macros with .Dv command.

* Replace 'man' with 'manual' for consistency.

Add a (somewhat verbose) manual page for vm_map(9).

Reviewed by: juli
Approved by: jake (mentor)