Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Make the search for sources in PATH_PORTS more accurate. I only
noticed that a "whereis -qs qemu" matched the distfiles subdir of qemu
rather than /usr/ports/emulators/qemu.

It now ignores all dot entries in /usr/ports, plus all entries
starting with a capital letter (maintenance stuff like Templates, but
also includes subdir CVS), plus /usr/ports/distfiles which is simply a
magic name in that respect.

Remove unused variables.

Fixed usage().

Respect locale settings from the environment.

Add the -a option to report all matches instead of only the
first of each requested type.

Approved by: joerg, sheldonh (mentor)

Correctly handle empty path arguments, e.g., whereis -S -f biff.

Approved by: joerg, sheldonh (mentor)

Define all paths in pathnames.h

Approved by: joerg, sheldonh (mentor)

Teach whereis(1) about games.

Approved by: joerg, sheldonh (mentor)

Complete rewrite, once again.

This is basically a ``C compilation'' of the former whereis.pl file,
employing the same algorithms, and aiming at being mostly
UI-compatible to the old (legally tainted) 4.3BSD whereis(1). In
comparision, the 4.4BSD-Lite version is just another variant of
which(1) only, where in particular the option to search for source
directories is sorely missing.

While i was at it, i added two more options which i contemplated doing
long since. -x will suppress the run of locate(1) to find sources
that could not be found otherwise, potentially saving a lot of time
(but obviously, risking to not find some sources that are well hidden
in the tree). -q will omit the leading name of the query, so in
particular, you can now do something like:

cd `whereis -qs ls`

I'd explicitly like to thank johan for his review which was quite a
bit more than an average review, including sending me a lot of diffs.

Reviewed by: johan

Restore copyright and RCSID.
Remove duplicate $FreeBSD$, $NetBSD$.

Submitted by: mike
Approved by: sheldonh (mentor)

compact synopsis
s/program [program ...]/program .../
s/program [...]/program .../

Approved by: sheldonh (mentor)

Remove -p flag.
OpenBSD's implementation lacks -p, and we don't want to
support the option now, only to lose it if/when we later
switch to OpenBSD's implementation.
This functionality is provided by which(1).

Approved by: sheldonh (mentor)

Add __FBSDID.
Remove __COPYRIGHT, __RCSID which caused an assembler warning.

Approved by: sheldonh (mentor)

Change to NetBSDs version of whereis.

Approved by: sheldonh (mentor)
Obtained from: NetBSD