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

module/os/freebsd/spl/acl_common.c

@@ -37,7 +37,6 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <stddef.h>
-#include <strings.h>
 #include <unistd.h>
 #include <assert.h>
 #include <grp.h>

module/os/freebsd/zfs/crypto_os.c

@@ -39,8 +39,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/sysctl.h>
 #include <opencrypto/cryptodev.h>
 #include <opencrypto/xform.h>
-#else
-#include <strings.h>
 #endif
 
 #include <sys/zio_crypt.h>

module/os/linux/spl/spl-generic.c

@@ -42,7 +42,7 @@
 #include <linux/ctype.h>
 #include <sys/disp.h>
 #include <sys/random.h>
-#include <sys/strings.h>
+#include <sys/string.h>
 #include <linux/kmod.h>
 #include <linux/mod_compat.h>
 #include <sys/cred.h>

module/os/linux/zfs/zfs_uio.c

@@ -44,7 +44,7 @@
 #include <sys/types.h>
 #include <sys/uio_impl.h>
 #include <sys/sysmacros.h>
-#include <sys/strings.h>
+#include <sys/string.h>
 #include <linux/kmap_compat.h>
 #include <linux/uaccess.h>