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

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

mdoc: terminate quoted strings.

Reviewed by: brueffer

Fix some Xr references:

- ada(4): ad(4) - removed, ada(4) would be a self-referencing entry
- cd(4): ad(4) -> ada(4)
- da(4): ad(4) -> ada(4)
- DEVICE_PROBE(9): ugen(5) -> ugen(4)
- ed(4): dhclinet(8) -> dhclient(8) (typo)
- lmc(4): Netgraph(4) -> netgraph(4)
- security(7): rc.conf(8) -> rc.conf(5)
- sfxge(4): cpuset(8) -> cpuset(1)
- sbp(4): sysctl(1) -> sysctl(8)
- portindex(5): build(1) -> build(7)
- u3g(4): usbconfig(5) -> usbconfig(8)
- usb_quirk(4): usbconfig(5) -> usbconfig(8)

Found with: textproc/igor
MFC after: 3 days

Fix various broken links in manual pages.

Submitted by: Michiel Overtoom (motoom % xs4all nl)
PR: 159130 159131 159132 159133 159134
159135 159136 159137 158138 159144
Approved by: re (kib)
MFC after: 3 days

Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki while
translating these manual pages. Minor corrections by me.

Submitted by: Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp>

Spelling fixes.

Remove stale altq instructions. They don't belong to the driver manpage
anyhow.

Remove reference to Alpha.

- Merge FreeBSD Configuration subsection etc. with SYNOPSIS.
- Remove the description of how to build a module.
- Remove the description of how to patch the sources.
- Refer to the polling(4) manpage on how to enable the polling mode.
- Tidy up markup.

Unifdef for FreeBSD.

Minimally fix this manpage to not emit warnings.

Fix .Dd argument.

Add the lmcconfig tool for controlling the lmc driver. Add man pages and
glue.

Submitted by: David Boggs