MFC r362623:

Fix copy/paste mistake in kvm_getswapinfo(3)

It seems this manpage was copied from kvm_getloadavg(3), but the
DIAGNOSTICS section was not updated completely. Update the section with
correct information about a return value of -1.

MFC r311101:
libkvm - extend a bit the swap statistics field.

Change ksw_used and ksw_total to unsigned, which increases the maximum
total swap that can be displayed properly from ~8TB to ~16TB.

Obtained from: DragonflyBSD (ecc2e461)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Expand the license referenced indirectly inline.

Mechanically kill hard sentence breaks.

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

mdoc(7) police: fixed the "new sentence" bogons.

Remove whitespace at EOL.

mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

mdoc(7) police: split punctuation characters + misc fixes.

Introduce .Lb macro to libkvm manpages.
Use .Pa macro for "enlighting" path

Repair misspelled `.Pp' directive:
.PP -> .Pp

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Fix type-o's in manual

Implement kvm_getswapinfo() libkvm function. Will be used by
pstat, top, and systat.