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

1 files changed, 2 insertions, 0 deletions

diff --git a/usr.bin/whereis/Makefile b/usr.bin/whereis/Makefile
index 20dcf0a..0d93791 100644
--- a/usr.bin/whereis/Makefile
+++ b/usr.bin/whereis/Makefile
@@ -2,5 +2,7 @@
 
 PROG=	whereis
 MAN=	whereis.1
+WARNS?=	6
+NO_WERROR= true
 
 .include <bsd.prog.mk>