- Update strcasecmp(3)/strncasecmp(3) to reflect the fact that

the prototypes for both functions are now in the <strings.h>
   header, as required by IEEE Std 1003.1-2001.
 - Add one sentence about that in the HISTORY section.
 - Include <strings.h> in the source file to have the prototypes
   in scope when the _ANSI_SOURCE macro is defined.

lib/libc/string/strcasecmp.3

@@ -44,7 +44,7 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In string.h
+.In strings.h
 .Ft int
 .Fn strcasecmp "const char *s1" "const char *s2"
 .Ft int
@@ -95,3 +95,10 @@ and
 .Fn strncasecmp
 functions first appeared in
 .Bx 4.4 .
+Their prototypes existed previously in
+.Aq Pa string.h
+before they were moved to
+.Aq Pa strings.h
+for
+.St -p1003.1-2001
+compliance.

lib/libc/string/strcasecmp.c

@@ -37,7 +37,7 @@ static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <string.h>
+#include <strings.h>
 #include <ctype.h>
 
 typedef unsigned char u_char;