Thanks to the following people for support, code, patches, etc:

Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
Jonathan R. Ferro <jferro@corwin.ece.cmu.edu>
Mark Kettenis  <kettenis@gnu.org>
Jesus Bravo Alvarez <jba@pobox.com>
John David Anglin <dave@hiauly1.hia.nrc.ca>
Paul Slootman <paul@murphy.nl>
Lionel CONS <lionel.cons@cern.ch>
"Gerrit P. Haase" <gerrit.haase@t-online.de>
Bruno Haible
Bob Prolux
Martin Buchholz
Steve Revilak 
Solar Designer <solar@openwall.com>
John Levon
Geoff Clare
Andreas Metzler
Bas van Gompel 
Jim Meyering
Dmitry V. Levin
Aaron S. Hawley

Suggestion for locate's ignore-case code:
Matt Mueller <donut@azstarnet.com>
"Stephane Barizien" <sba@ocegr.fr>