sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

sys/modules: normalize .CURDIR-relative paths to SRCTOP

This simplifies make output/logic

Tested with: `cd sys/modules; make ALL_MODULES=` on amd64
MFC after: 1 month
Sponsored by: Dell EMC Isilon

Remove leftovers from previous commits.

Approved by: jhb

Cleanup some sound headers that don't need to be in the modules makefiles.

Approved by: jhb (mentor)
MFC after: 1 week

Replace a GPL'd header in the emu10k1 snd driver code.

This brings in the emuxkireg.h from NetBSD (dev/pci) which
is used for the same purpose but is smaller. The emu10k1
is now free from the GPL.

PR: 153901
Obtained from: NetBSD
Approved by: core (mentor implicit)
MFC after: 2 weeks

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

- Import the HEAD csup code which is the basis for the cvsmode work.

Commit the new (old) midi framework. It's based in parts on the NetBSD code,
but large parts are rewritten by matk and tanimura.

This is old code, it's not maintained since 2003. We also don't have a
maintainer for this! Yuriy Tsibizov took it and uses it in his emu10kx
driver. Since the emu10kx driver will enter the tree "soon" (some bugs
have to be fixed after Yuriy return from his holidays), I add it here
already.

This also contains some changes to emu10k1 and cmi, so if you're lucky,
you can now make some kind of use of midi with those soundcards.

To all those poor souls which don't have such a card: feel free to send
patches, we don't have a maintainer for this.

To those which miss a specific feature in the midi code: feel free to
submit patches, we don't have a maintainer for this.

Oh, did I already told that it would be nice if someone would take care
of it? Maintainer with midi equipment wanted! :-)

If you get LOR's, submit a PR and notify multimedia@ please. If you get
panics, submit a PR with a backtrace (compile the sound system into your
kernel instead of using modules in this case) and notify multimedia@
please.

Written by: matk, tanimura
Submitted by: "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru>
Based upon: code from NetBSD

Add Audigy support.
I started with a year-old patch by Orlando Bassotto
<orlando.bassotto@ieo-research.it>, and ported it to 5.2-CURRENT along with
fixing the problems working with pre-Audigy cards.

isa_if.h is not needed.

No response from: sound

Use a consistent style and one much closer to the rest of /usr/src

newpcm module makefiles

once built, 'kld_load snd_driver; kldunload snd_driver' will load all sound
drivers and unload all unattached ones. attached drivers do not yet support
unloading.