Restart the mailpile daemon after upgrades

src/freedombone-app-mailpile

@@ -105,6 +105,7 @@ function upgrade_mailpile {
     pip install -r requirements.txt
 
     chown -R mailpile:mailpile "/var/www/$MAILPILE_DOMAIN_NAME/mail"
+    systemctl restart mailpile
 }
 
 function backup_local_mailpile {