Description:
------------
ssl connection not working, same code with 5.2.12 working well.
With reference to bug 49234, I have support [33] => ssl_set.

mysql client working well too.
mysql ... --ssl-ca=cert/mysql-cacert.pem --ssl-cert=cert/client-cert.pem --ssl-key=cert/client-key.pem
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 116395
Server version: 5.0.90-community-log MySQL Community Edition (GPL)
mysql> SHOW STATUS LIKE 'Ssl_cipher';
+---------------+--------------------+
| Variable_name | Value              |
+---------------+--------------------+
| Ssl_cipher    | DHE-RSA-AES256-SHA |
+---------------+--------------------+
1 row in set (0.00 sec)

from phpinfo
mysqli

MysqlI Support => enabled
Client API library version => 5.1.42
Active Persistent Links => 0
Inactive Persistent Links => 0
Active Links => 0
Client API header version => 5.1.42
MYSQLI_SOCKET => /var/lib/mysql/mysql.sock

Directive => Local Value => Master Value
mysqli.allow_local_infile => Off => Off
mysqli.allow_persistent => On => On
mysqli.default_host => no value => no value
mysqli.default_port => 3306 => 3306
mysqli.default_pw => no value => no value
mysqli.default_socket => no value => no value
mysqli.default_user => no value => no value
mysqli.max_links => Unlimited => Unlimited
mysqli.max_persistent => Unlimited => Unlimited
mysqli.reconnect => Off => Off

Client is Mysql 5.1 and server is Mysql 5.0. But same for 5.0 Mysql 
client. In case PHP 5.2 Mysql client is 5.0.

Reproduce code:
---------------
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$mysqli = mysqli_init();
$mysqli->ssl_set('./cert/client-key.pem', './cert/client-cert.pem', './cert/mysql-cacert.pem', null, null);
$mysqli->real_connect('removed', '', '', '');
if ($r = $mysqli->query("SHOW STATUS LIKE 'Ssl_cipher'")) {
    var_dump($r->fetch_row());
}
echo $mysqli->error."\n";
echo $mysqli->errno."\n";

Expected result:
----------------
something like this for Ssl_cipher
array(2) {
  [0]=>
  string(10) "Ssl_cipher"
  [1]=>
  string(18) "DHE-RSA-AES256-SHA"
}

and no errors.

Actual result:
--------------
Warning: mysqli::ssl_set(): invalid object or resource mysqli

with MYSQLI_CLIENT_SSL
Can't connect to MySQL server on 'removed' (113)
errno = 2003
 
without MYSQLI_CLIENT_SSL
Warning: mysqli::real_connect(): (28000/1045): Access denied for 
user 'removed' (using password: YES)
errno = 1045

ssl_set() in this case returns NULL, not true as doc says.