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

Make WARNS=6 safe.

Tested with Clang 3.7.1, GCC 4.2.1 and GCC 4.8.5 on amd64.

Install <dev/agp/agpreg.h> and <dev/pci/pcireg.h> as userland headers
in /usr/include.

MFC after: 2 weeks

Add a new -e flag to pciconf(8)'s list mode to display PCI error details.
Currently this dumps the status of any error bits in the PCI status register
and PCI-express device status register. It also lists any errors indicated
by version 1 of PCI-express Advanced Error Reporting (AER).

MFC after: 1 week

The last big commit: let usr.sbin/ use WARNS=6 by default.

- Teach pciconf(8) to list the PCI capabilities supported by each device
via a new -c flag to be used with -l. Some simple parsing code is
present for the following capabilities: Power Management, AGP, VPD,
MSI, PCI-X, HyperTransport, Vendor-specific, EHCI Debug Port, PCI-PCI
bridge subvendor ID, PCI-express, and MSI-X.
- Fix a few warnings in pciconf.c.
- Update some cruft in pciconf(8):
- PCI 2.1 is no longer a revolutionary standard, and subvendor ID's are
fairly common at this point, so reflect that.
- Header type 2 is used for PCI-CardBus bridges.
- Describe the -v option for -l after completing the basic -l description
instead of disrupting the flow in the middle.

Reviewed by: imp (partially)
MFC after: 1 week

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for usr.sbin/ to 8.

Unbreak this file some more:

CFLAGS=+-I${.CURDIR}/../../sys -> CFLAGS+= -I${.CURDIR}/../../sys

Asked about on BSDnet:#FreeBSD by: philw@dream.webmaster.com (Phillip White)

Unbreak it. Apparently I forgot to do a make clean when testing :-(
Unfortunately, Makefile is not included in .depend.

Remove -I/sys

Oops, get the name of the new manpage right.

Actually install the new manpage.

This commit was generated by cvs2svn to compensate for changes in r19102,
which included commits to RCS files with non-trunk default branches.

Initial version of the user land code for the PCI config register
access functions. Written by Garrett Wollman and modified by me to
better match my view of the (PCI) world.

Submitted by: wollman