Add test case for improper persistent PW handling

Author: NattyNarwhal

tests/test_222_PersistentConnReuseWithBadPassword.phpt

@@ -0,0 +1,31 @@
+--TEST--
+IBM-DB2: db2_pconnect() - test persistent connection won't be reused with bad password
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+
+require_once('connection.inc');
+
+/*
+ * Use blatantly incorrect password, to make sure password is part of the
+ * internal persistent connection hash.
+ */
+$conn1 = db2_pconnect($database, $user, $password);
+if ($conn1) {
+    $conn2 = db2_pconnect($database, $user, "wrongbad");
+    if ($conn2) {
+        echo "A bad password was accepted.\n";
+        db2_close($conn2);
+    } else {
+        echo "OK\n";
+    }
+    db2_close($conn1);
+}
+else {
+    echo "Connection failed.\n";
+}
+
+?>
+--EXPECT--
+OK