Use system version of strcasecmp on DragonFly, prototype conflicts

and it doesn't make much sense either.

mail/autorespond/distinfo

@@ -1,5 +1,6 @@
-$NetBSD: distinfo,v 1.3 2005/02/24 09:59:20 agc Exp $
+$NetBSD: distinfo,v 1.4 2006/01/08 17:55:31 joerg Exp $
 
 SHA1 (autorespond-2.0.5.tar.gz) = 9bdd160e93e886932b7679e915d72dca90d8de6a
 RMD160 (autorespond-2.0.5.tar.gz) = c86f56d02ac1f609605a4349a59b4293eff2ca15
 Size (autorespond-2.0.5.tar.gz) = 9707 bytes
+SHA1 (patch-aa) = d426dbedcb0fa62dd81fc77eb6c908c55f8b3023

mail/autorespond/patches/patch-aa

@@ -0,0 +1,22 @@
+$NetBSD: patch-aa,v 1.1 2006/01/08 17:55:31 joerg Exp $
+
+--- autorespond.c.orig	2006-01-08 17:51:50.000000000 +0000
++++ autorespond.c
+@@ -372,7 +372,7 @@ void read_headers( FILE *fp )
+ }
+ 
+ 
+-
++#if !defined(__DragonFly__)
+ /*********************************************************
+ ** find string in string - ignore case **/
+ 
+@@ -398,7 +398,7 @@ char *strcasestr( char *_s1, char *_s2 )
+ 	else
+ 		return _s1 + (ptr - s1);
+ }
+-
++#endif
+ 
+ 
+