add some php 7+ array type hints.

model/AliasHandler.php

@@ -254,7 +254,7 @@ class AliasHandler extends PFAHandler {
         }
     }
 
-    protected function setmore($values) {
+    protected function setmore(array $values) {
         if ($this->new) {
             if ($this->struct['address']['display_in_form'] == 1) { # default mode - split off 'domain' field from 'address' # TODO: do this unconditional?
                 list(/*NULL*/, $domain) = explode('@', $values['address']);

model/FetchmailHandler.php

@@ -85,7 +85,7 @@ class FetchmailHandler extends PFAHandler {
     }
 
 
-    protected function setmore($values) {
+    protected function setmore(array $values) {
         # set domain based on the target mailbox
         if ($this->new || isset($values['mailbox'])) {
             list(/*NULL*/, $domain) = explode('@', $values['mailbox']);

model/MailboxHandler.php

@@ -273,7 +273,7 @@ class MailboxHandler extends PFAHandler {
 
 
     // Could perhaps also use _validate_local_part($new_value) { .... }
-    public function set($values) {
+    public function set(array $values) {
         // See: https://github.com/postfixadmin/postfixadmin/issues/282 - ensure the 'local_part' does not contain an @ sign.
         $ok = true;
         if (isset($values['local_part']) && strpos($values['local_part'], '@')) {

model/PFAHandler.php

@@ -418,7 +418,7 @@ abstract class PFAHandler {
      * @return bool - true if all values are valid, otherwise false
      * error messages (if any) are stored in $this->errormsg
      */
-    public function set($values) {
+    public function set(array $values) {
         if (!$this->can_edit) {
             $this->errormsg[] = Config::Lang_f('edit_not_allowed', $this->label);
             return false;
@@ -521,7 +521,7 @@ abstract class PFAHandler {
      * can be used to update additional columns etc.
      * hint: modify $this->values and $this->errormsg directly as needed
      */
-    protected function setmore($values) {
+    protected function setmore(array $values) {
         # do nothing
     }