getopt.c is public domain. Add a comment to that effect.

Remove confusing README.

PR:		bin/98911
Submitted by:	Jason McIntyre <jmc at kerhand dot co dot uk>
Obtained from:	OpenBSD
MFC after:	3 days

usr.bin/getopt/README

@@ -1,57 +0,0 @@
-/***** unido:mod.std.unix / ut-sally!jsq /  8:54 pm  Jul  4, 1985*/
-From: John Quarterman (moderator) <ut-sally!std-unix>
- 
-Topic: yet more on getopt (command line arguments)
- 
-Two more messages, the first a followup to a previous posting, and
-the second public domain sources and man pages for getopt(3) and getopt(1).
-	-mod
-
-----------------------------------------------------------------------
-
-From: ihnp4!utzoo!henry
-Date: 3 Jul 85 18:34:41 CDT (Wed)
-To: ihnp4!ut-sally!std-unix
-Subject: Re: command line arguments
-
-> > A group of bundled options may end with an option that has an argument.
-> 
-> This creates confusion in using C-Kermit when you want to send an image
-> file.  For example:
-> 
-> 	send -is filename     < ---  works fine
->         send -si filename     < ---  bombs the program
-
-The AT&T syntax standard (which getopt does not completely enforce)
-actually forbids both of these usages.  Options with arguments are not
-allowed to be bundled, and they must be separated from their arguments
-by a space.
-
-> I would *much* prefer to bundle the flags, then
-> have those with arguments pick them up in the same order as the flags are
-> listed.
-
-The few existing commands that use such a convention, notably tar(1), are
-(in my experience) the worse for it.  It's seriously error-prone.  I think
-the AT&T people did the right thing.
-
-------------------------------
-
-Date: Tue, 2 Jul 85 13:07:09 edt
-From: ihnp4!utcs!ian (Ian F. Darwin)
-To: ihnp4!ut-sally!jsq@tzec.UTEXAS.ARPA
-Subject: here is getopt
-
-Here is the source for getopt(3), the function that should be in
-everybody's C program, and getopt(1), a program that uses it to
-make shell programs comprehensible and consistent. There are man
-pages for both. Please send these on to the mod. group. Thanks.
-
-[ I have hacked the following shell script slightly so that
-it doesn't extract directly into system source directories,
-rather into the current directory.  It should be assumed that
-this code comes with no warranty from me, Ian Darwin, or anyone
-else as to whether it accurately represents getopt as distributed
-with System V, or any command line standard, or that it works
-at all, or that it will cause no damage when extracted or used. -mod]
-

usr.bin/getopt/getopt.c

@@ -1,6 +1,11 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+/*
+ * This material, written by Henry Spencer, was released by him
+ * into the public domain and is thus not subject to any copyright.
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>