Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12996

lib/libspl/include/sys/Makefile.am

@@ -29,7 +29,7 @@ libspl_HEADERS = \
 	simd.h \
 	stack.h \
 	stdtypes.h \
-	strings.h \
+	string.h \
 	stropts.h \
 	sunddi.h \
 	systeminfo.h \

lib/libspl/include/sys/string.h

@@ -0,0 +1 @@
+#include <string.h>

lib/libspl/include/sys/strings.h

@@ -1,33 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#ifndef _LIBSPL_SYS_STRINGS_H
-#define	_LIBSPL_SYS_STRINGS_H
-
-#include <string.h>
-#include <strings.h>
-
-#endif