Fix tc/m_ipt memory leaks

1)optind according iptables sources have to be set to 0. If it is set to 1, in
batch it will mess up things. Also in iptables sources i notice that ->tflags
and ->used need to be reset.

2)Since target->t = fw_calloc(1, size); allocated memory in function build_st,
it have to be freed at the end, or in batch we will have memory leak. TODO:
Probably it must be freed in all "return -1" cases in parse_ipt after
build_st. About this i am not sure, up to Stephen.

3)new_name was malloc'ed, but not freed

tc/m_ipt.c

@@ -277,6 +277,8 @@ get_target_name(const char *name)
 		if (!handle) {
 			fputs(dlerror(), stderr);
 			printf("\n");
+			free(l_name);
+			free(new_name);
 			return NULL;
 		}
 	}
@@ -292,12 +294,16 @@ get_target_name(const char *name)
 					fputs(error, stderr);
 					fprintf(stderr, "\n");
 					dlclose(handle);
+					free(l_name);
+					free(new_name);
 					return NULL;
 				}
 			}
 		}
 	}
 
+	free(l_name);
+	free(new_name);
 	return m;
 }
 
@@ -512,8 +518,15 @@ static int parse_ipt(struct action_util *a,int *argc_p,
 	*argc_p = rargc - iargc;
 	*argv_p = argv;
 
-	optind = 1;
+	optind = 0;
 	free_opts(opts);
+	/* Clear flags if target will be used again */
+        m->tflags=0;
+        m->used=0;
+	/* Free allocated memory */
+        if (m->t)
+            free(m->t);
+
 
 	return 0;