Rename mcrypt_cbf -> mcrypt_cfb

Also fix ECB -> CFB in the initialization vector size call (not that it
makes a difference, they have the same size).

ext/mcrypt/tests/mcrypt_cbf.phpt → ext/mcrypt/tests/mcrypt_cfb.phpt

@@ -1,5 +1,5 @@
 --TEST--
-mcrypt_cbf
+mcrypt_cfb
 --SKIPIF--
 <?php if (!extension_loaded("mcrypt")) print "skip"; ?>
 --FILE--
@@ -8,7 +8,7 @@ $key      = "FooBar";
 $secret   = "PHP Testfest 2008";
 $cipher   = MCRYPT_RIJNDAEL_128;
 
-$iv       = mcrypt_create_iv(mcrypt_get_iv_size($cipher, MCRYPT_MODE_ECB), MCRYPT_RAND);
+$iv       = mcrypt_create_iv(mcrypt_get_iv_size($cipher, MCRYPT_MODE_CFB), MCRYPT_RAND);
 $enc_data = mcrypt_cfb($cipher, $key, $secret, MCRYPT_ENCRYPT, $iv);
 
 // we have to trim as AES rounds the blocks and decrypt doesnt detect that