penctl host:port no acl => pen segfault (version 0.18.0)
--- pen.c	2008-05-03 09:29:36.000000000 +0200
+++ pen.c-noacl	2008-12-31 13:44:18.000000000 +0100
@@ -1593,8 +1593,10 @@
 		if (!strcmp(p, "acl")) {
 			int a;
 			p = strtok(NULL, " ");
-			a = atoi(p);
-			del_acl(a);
+			if (p != NULL) {
+			   a = atoi(p);
+			   del_acl(a);
+			} else { b = "error: no acl id given\n"; output(b, op); }
 		} else if (!strcmp(p, "ascii")) {
 			asciidump = 0;
 		} else if (!strcmp(p, "block")) {