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

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@

Teach md5(1) about sha512.

MFC after: 1 month

Switch the default WARNS level for sbin/ to 6.

Submitted by: Ulrich Spörlein

In light of the recent 2^69 operation collision-finding attack on SHA1,
add support for SHA256.

Tested on: i386, sparc64
Tested using: NIST test vectors, built-in tests
X-MFC-after: 5.4-RELEASE

Add sha1 and rmd160 checksum tools.

Since the algorithms are already supported in libmd,
the size increase is small when a dynamic root is used.

Approved by: joerg, ru
MFC after: 2 weeks

Fixed style of DPADD and LDADD assignments as per style.Makefile(5).

Default to WARNS=2.
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by: mike

WARNS= -> WARNS?=

Submitted by: Mike Barcroft <mike@q9media.com>

Fix argument processing.
Make this compile with WARNS=2.

PR: bin/27524
MFC after: 3 days

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

Set the default manual section for sbin/ to 8.

/usr/lib/libmd.a -> ${LIBMD}

This commit was generated by cvs2svn to compensate for changes in r3995,
which included commits to RCS files with non-trunk default branches.

Incorproate version of md5 placed into public domain by RSA.