Fix typo

clients/tools/common.c

@@ -163,7 +163,7 @@ N_("  -M         enable Manage DSA IT control (-MM to make critical)\n"),
 N_("  -n         show what would be done but don't actually do it\n"),
 N_("  -O props   SASL security properties\n"),
 N_("  -p port    port on LDAP server\n"),
-N_("  -P version procotol version (default: 3)\n"),
+N_("  -P version protocol version (default: 3)\n"),
 N_("  -Q         use SASL Quiet mode\n"),
 N_("  -R realm   SASL realm\n"),
 N_("  -U authcid SASL authentication identity\n"),