- Added comment about imap_ns_* settings

config/main.inc.php.dist

@@ -81,6 +81,8 @@ $rcmail_config['imap_delimiter'] = null;
 // If IMAP server doesn't support NAMESPACE extension, but you're
 // using shared folders or personal root folder is non-empty, you'll need to
 // set these options. All can be strings or arrays of strings.
+// Folders need to be ended with directory separator, e.g. "INBOX."
+// (special directory "~" is an exception to this rule)
 $rcmail_config['imap_ns_personal'] = null;
 $rcmail_config['imap_ns_other']    = null;
 $rcmail_config['imap_ns_shared']   = null;