tighten psalm checks

scripts/snippets/crypt.php

@@ -20,7 +20,7 @@ class Crypt {
     }
   
     /**
-     * @return true/false boolean
+     * @return bool 
      */
     public function crypt($algorithm) {
         return true;

scripts/snippets/dovecot_crypt.php

@@ -58,6 +58,7 @@ class DovecotCrypt extends Crypt {
 
         $this->password = $this->$func($this->plain);
         //$this->plain = '';
+        return true;
     }
 
     public function verify($algorithm, $password) {