Rename message_cache_lifetime to messages_cache_ttl option for naming consistency

config/main.inc.php.dist

@@ -128,9 +128,8 @@ $rcmail_config['imap_cache'] = null;
 // Enables messages cache. Only 'db' cache is supported.
 $rcmail_config['messages_cache'] = false;
 
-// lifetime of message cache
-// possible units: s, m, h, d, w
-$rcmail_config['message_cache_lifetime'] = '10d';
+// Lifetime of messages cache. Possible units: s, m, h, d, w
+$rcmail_config['messages_cache_ttl'] = '10d';
 
 // ----------------------------------
 // SMTP

program/lib/Roundcube/rcube_config.php

@@ -43,6 +43,7 @@ class rcube_config
         'reply_mode'           => 'top_posting',
         'refresh_interval'     => 'keep_alive',
         'min_refresh_interval' => 'min_keep_alive',
+        'messages_cache_ttl'   => 'message_cache_lifetime',
     );
 
 

program/lib/Roundcube/rcube_imap.php

@@ -3691,7 +3691,7 @@ class rcube_imap extends rcube_storage
     {
         if ($this->caching && !$this->cache) {
             $rcube = rcube::get_instance();
-            $ttl = $rcube->config->get('message_cache_lifetime', '10d');
+            $ttl = $rcube->config->get('messages_cache_ttl', '10d');
             $this->cache = $rcube->get_cache('IMAP', $this->caching, $ttl);
         }
 
@@ -3745,7 +3745,7 @@ class rcube_imap extends rcube_storage
     public function expunge_cache()
     {
         if ($this->mcache) {
-            $ttl = rcube::get_instance()->config->get('message_cache_lifetime', '10d');
+            $ttl = rcube::get_instance()->config->get('messages_cache_ttl', '10d');
             $this->mcache->expunge($ttl);
         }