- 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

Add the Clang specific -Wmissing-variable-declarations to WARNS=6.

This compiler flag enforces that that people either mark variables
static or use an external declarations for the variable, similar to how
-Wmissing-prototypes works for functions.

Due to the fact that Yacc/Lex generate code that cannot trivially be
changed to not warn because of this (lots of yy* variables), add a
NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this
specific compiler warning.

Announced on: toolchain@

mdoc: point to an existing cross reference.

Fix world after byacc import:
- old yacc(1) use to magicially append stdlib.h, while new one don't
- new yacc(1) do declare yyparse by itself, fix redundant declaration of
'yyparse'

Approved by: des (mentor)

Another couple of unsigned/ssize_t changes.

Type-change to ssize_t to (app|pl)ease ppc platform.

Update fifolog internals to match main version:

Rename ...write_bytes... to ...write_records..., that's what they do.

Move writer .h stuff into writer private .h file.

Change logic in writer to support both fifolog usage in FreeBSD and
Measured usage better, by always using an input buffer.

Various cleanups.

Don't override the perfectly good default ->zalloc and ->zfree functions.

Fix a bunch of trivial whitespace mistakes and update the miniobj.h
file before the real work starts.

Use a "push" strategy to get data through libz, rather than a "pull" strategy.

Typo fixes

PR: docs/149314
Submitted by: olgeni
MFC after: 3 days

Fix reading of empty fifolog files. When we don't have anything
to inflate, skip the rest of the fifolog reader code to avoid
hitting the assert about Z_OK a bit further down.

Approved by: phk
MFC after: 1 week

Do not attempt to render a logrecord with length byte, until we have
decompressed all the bytes required.

mdoc: order prologue macros consistently by Dd/Dt/Os

Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by: ru
Approved by: philip, ed (mentors)

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

ANSIfy almost all applications that use WARNS=6.

I was considering committing all these patches one by one, but as
discussed with brooks@, there is no need to do this. If we ever
need/want to merge these changes back, it is still possible to do this
per application.

Unify fifolog_writer usage printout with fifolog_create and
fifolog_reader.

Approved by: trasz (mentor)

Fixed NAME section.

The last sector in the first segment might just be a sync, increment before
checking validity of segment two.

Don't overwrite it, if only one sector is written yet.

Discovered by: "Dewayne Geraghty" <dewayne.geraghty@heuristicsystems.com.au>

Fix a cornercase during search

Populate usage()

Submitted by: Jaakko Heinonen <jh@saunalahti.fi>

Clean up makefiles and a manpage.

OK'ed by: phk

Accept empty -T arguments.

Proposed by: clemens fischer <ino-qc@spotteswoode.de.eu.org>

Fix two bugs introduced in conversion to FreeBSD source tree:

Off by one error in length calcuation of string records.
Don't attempt to free stack variable.

Remove trailing ';' on macros.

Spotted by: antoine

Add the fifolog tools to FreeBSD.

Quoth the man-page:

Fifologs provide a compact round-robin circular storage for recording
text and binary information to permanent storage in a bounded and pre-
dictable fashion, time and space wise.

Not yet connected to the build, but feel free to test & review.