- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Make the SYNOPSIS section a bit more informative.

No one cares about when the manual page first appeared. Mention when the
driver appeared instead.

soundcard -> sound card

MFC after: 3 days

Remove superfluous .Pp call.

Submitted by: Joel Dahl <joel@automatvapen.se>
MFC after: 3 days

Update sound-related manpages to account for the recent change in
device and module naming. The following files were repo-copied:

csa.4 -> snd_csa.4
gusc.4 -> snd_gusc.4
maestro3.4 -> snd_maestro3.4
sbc.4 -> snd_sbc.4
uaudio.4 -> snd_uaudio.4

The pcm(4) manpage wasn't renamed to sound(4) as there are nearby
plans to rename "device sound" to "device snd", to address the
ambiguity in naming, so pcm.4 is linked to sound.4 for the moment.
(We also mumble something about the future plans in the manpage.)

Removed links from pcm.4 to als4000.4 and emu10k1.4 -- they now
have their own snd_*.4 manpages.

Fixes for recent snd_*.4 manpages: added missing "device sound"
to the SYNOPSIS, fixed hints (they are still "hint.pcm.<unit>"
in most cases).

MT5 after: 3 days

Add manual pages for several sound drivers.

Submitted by: Atte Peltomaki <koston@iki.fi>
Reviewed by: cg
MFC after: 5 days