vendor/diffutils: upgrade from 3.3 to 3.7

Summary of notable changes:

- new options --color and --palette to generate and configure colored
output, compatible with less -R
- when binary files dif

vendor/diffutils: upgrade from 3.3 to 3.7

Summary of notable changes:

- new options --color and --palette to generate and configure colored
output, compatible with less -R
- when binary files differ, diff now exits with status 1 as POSIX requires
- unless the --ignore-file-name-case option is used, diff now
considers file names to be equal only if they are byte-for-byte
equivalent
- diff -B no longer generates incorrect output if the two inputs each end
with a one-byte incomplete line
- diff --brief no longer reports a difference for unusual identical files
- diff3 no longer malfunctions due to use-after-free
- using an invalid regular expression with --ignore-matching-lines=RE (-I)
no longer causes stack overflow
- possible uninitialized memory read with --strip-trailing-cr fixed
- default algorithm has been adjusted to output higher-quality results,
and further tweaked to deal better with larger files

For a complete history of changes see:

http://git.savannah.gnu.org/cgit/diffutils.git/log/

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Upgrade diffutils from 3.2 to 3.3 on the vendor branch

Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

Upgrade diffutils from 3.0 to 3.2 on the vendor branch

Upgrade diffutils from 2.8.7 to 3.0 on the vendor branch

Remove the version number from the diffutils dir.

This is a complete overhaul in the diffutils makefile system. The
directories gnu/usr.bin/diff3 and gnu/usr.bin/sdiff have been removed
as a result. Those directories also used the deprecated patch

This is a complete overhaul in the diffutils makefile system. The
directories gnu/usr.bin/diff3 and gnu/usr.bin/sdiff have been removed
as a result. Those directories also used the deprecated patch approach.

Like grep before it, diffutils uses its own regex library. The
previous version used gnuregex.

The README.DELETED was woefully out of date. It is hoped this overhaul
will make future diffutils upgrades easier.

=========================================================
Noteworthy changes in release 2.9 (2010-02-11) [stable]
=========================================================

** New features

New diff option --suppress-blank-empty.

Bring back support for `diff -NUM', where NUM is a number,
even when conforming to POSIX 1003.1-2001. This change reverts to
the behavior of GNU diff 2.7 and earlier. This is a change only
when conforming to POSIX 1003.1-2001; there is no effect when
conforming to older POSIX versions.

This change is in response to decisions taken in the January 2005
Austin Group standardization meeting. For more details, please see
"Utility Syntax Guidelines" in the Minutes of the January 2005
Meeting <http://www.opengroup.org/austin/docs/austin_239.html>.

sdiff now understands '1' and '2' as synonyms for 'l' and 'r'.

** Changes in behavior

sdiff and diff3 now invoke diff, not $(bindir)/diff

** Administrivia

New discussion and bug-reporting address: bug-diffutils@gnu.org

updated gnulib support

=========================================================
Noteworthy changes in release 3.0 (2010-05-03) [stable]
=========================================================

** Bug fixes

diff once again prints the required "\ No newline at end of file" line
when at least one input lacks a newline-at-EOF and the final hunk plus
context-length aligns exactly with the end of the newline-lacking file.
[bug introduced between 2.8.7 and 2.9]

** Changes in behavior

In context-style diffs, diff prints a portion of a preceding "function"
line for each hunk, with --show-function-line=RE (-F) or
--show-c-function (-p). Now, it trims leading blanks from such lines
before extracting a prefix. This is useful especially when a function
line is so far indented that the name itself would be truncated or not
included in the limited-width substring that diff appends.

diff once again reports a difference with the diagnostic
"Binary files A and B differ" when at least one of the files
appears to be binary. From 2.8.4 through diffutils-2.9, it printed
"Files A and B differ".

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