Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

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

Add missing library dependencies and sort libraries
using lorder(1) so that static linkage is possible.

- Add support for filtering the the list of providers by a regular
expression, which makes it possible to only see interesting
providers. "f" is used inside gstat to set a filter, "F" is used to
remove current filter.
- Do not print some uninteresting values in the gstat title line.
- Do not print past the end of the screen.
- Read multiple keystrokes per "wait" when gstat is running.
- Remove a redundant != check, right after check of NULL against the
same variable ("gid").
- Use sysexits.h.
- Do not link against libkvm and libsbuf, they are not actually used.
- Fix a few style(9) issues where I had to touch nearby code anyway.

Approved by: cperciva (mentor)
MFC after: 2 weeks

Remove unnecessary SRCS= where could be guessed directly by our
bsd.*.mk infrasture.

Obtained from: ru

Install the gstat manual page.

Why doesn't anybody ever tell me anything? When did we get a libsbuf ?

Geeze, I'll just crawl back into the kernel where I know what's going on...

Use libsbuf instead of pulling a file in from the kernel.

Taught by: jhb

Fixed a typo in ${.CURDIR} spelling, fatal on systems
without the /sys symlink pointing to the current tree.
(Revision 1.2 made it non-fatal, but anyway.)

Apply style.Makefile(5).

Fixed ``make checkdpadd''.

Duh! Use correct number ../

spotted by: imp

Add a rudimentary gstat(8) to the system.

This is a small curses based program which shows the diskactivity
inside GEOM.