cleanup MemCache timeout API after #804

use milliseconds only and fall back to seconds for older memcache
versions.

framework/yii/caching/MemCache.php

@@ -93,8 +93,13 @@ class MemCache extends Cache
 				if ($this->useMemcached) {
 					$cache->addServer($server->host, $server->port, $server->weight);
 				} else {
-					$cache->addServer($server->host, $server->port, $server->persistent,
+					// $timeout is used for memcache versions that do not have timeoutms parameter
-						$server->weight, $server->timeout, $server->retryInterval, $server->status, $server->failureCallback, $server->timemoutms);
+					$timeout = (int) ($server->timeout / 1000) + (($server->timeout % 1000 > 0) ? 1 : 0);
+					$cache->addServer(
+						$server->host, $server->port, $server->persistent,
+						$server->weight, $timeout, $server->retryInterval,
+						$server->status, $server->failureCallback, $server->timeout
+					);
 				}
 			}
 		} else {

framework/yii/caching/MemCacheServer.php

@@ -35,9 +35,11 @@ class MemCacheServer extends \yii\base\Object
 	 */
 	public $persistent = true;
 	/**
-	 * @var integer value in seconds which will be used for connecting to the server. This is used by memcache only.
+	 * @var integer timeout in milliseconds which will be used for connecting to the server.
+	 * This is used by memcache only. For old versions of memcache that only support specifying
+	 * timeout in seconds this will be rounded up to full seconds.
 	 */
-	public $timeout = 1;
+	public $timeout = 1000;
 	/**
 	 * @var integer how often a failed server will be retried (in seconds). This is used by memcache only.
 	 */
@@ -47,14 +49,10 @@ class MemCacheServer extends \yii\base\Object
 	 */
 	public $status = true;
 	/**
-	 * @var \Closure allows the user to specify a callback function to run upon encountering an error.
+	 * @var \Closure this callback function will run upon encountering an error.
 	 * The callback is run before fail over is attempted. The function takes two parameters,
 	 * the [[host]] and the [[port]] of the failed server.
+	 * This is used by memcache only.
 	 */
-	public $failureCallback = null;
+	public $failureCallback;
-	/**
-	 * @var integer value in milliseconds which will be used for connecting to the server.
-	 * Takes precedence over [[timeout]]. This is used by memcache only.
-	 */
-	public $timemoutms = 1000;
 }