Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add missing static keywords to look(1)

Sort header file names.

Spotted by: des

Add missing #include.

Note to myself: don't write patches while watching a movie.

Don't cast SIZE_T_MAX to off_t.

I focused so much on the 32-bits case where we have to cast SIZE_T_MAX
up in size, that I forgot about the 64-bits case, where off_t and size_t
are equal in size. Simply cast both numbers to uintmax_t, as we can
assume st_size is never negative.

Reported by: cperciva

Build look(1) with WARNS=6.

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

Don't try to mmap the contents of empty files. This behaviour was harmless
prior to r195693, since historical behaviour of mmap(2) was to silently
ignore length-zero mmap requests; but mmap now returns EINVAL, which caused
look(1) to emit an error message and fail.

Among other things, this makes `freebsd-update fetch` on a newly installed
8.0-BETA3 system print bogus warning messages.

MFC after: 3 days

Remove break after return.

Added the EXIT STATUS section where appropriate.

Sort sections.

Move exit status information into a DIAGNOSTICS section. Add an ENVIRONMENT
section. Re-add a sentence from the BUGS section that went missing in
the previous commit.

Add support for multibyte characters. While here, fix a longstanding bug in
the implementation of the -d option: we were skipping too many characters
when a non-alphanumeric character was encountered.

Point out in the BUGS section that look expects input files to have
been sorted with LC_COLLATE=C.

Document incorrect handling of multibyte characters.

Mechanically kill hard sentence breaks.

Introduce options definition the standard way.

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

Consistently use FBSDID

Fix a const-char vs char issue.

Use `The .Nm utility'

remove __P

Warns cleanup - not ready for WARNS=2 yet.

Remove whitespace at EOL.

mdoc(7) police: use the default ``file ...'' feature of the .Ar macro.

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Support multiple databases. For example

$ look miau dict1 dict2 dict3

revert: The warning was supposed to irritate someone into fixing this.

unsigned char -> caddr_t for mmap's return value.

Use err(3) instead of local redefinition.

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Merge from Lite2

Sweep through the tree fixing mmap() usage:

- Use MAP_FAILED instead of the constant -1 to indicate
failure (required by POSIX).
- Removed flag arguments of '0' (required by POSIX).
- Fixed code which expected an error return of 0.
- Fixed code which thought any address with the high bit set
was an error.
- Check for failure where no checks were present.

Discussed with: bde

Use the .At macro where appropriate.

Make it works with 8bit charsets
Add setlocale LC_CTYPE

Remove trailing whitespace.

This commit was generated by cvs2svn to compensate for changes in r1590,
which included commits to RCS files with non-trunk default branches.