Set mailpile permissions after upgrade

src/freedombone-app-mailpile

 
     function_check set_repo_commit
     set_repo_commit /var/www/$MAILPILE_DOMAIN_NAME/mail "mailpile commit" "$MAILPILE_COMMIT" $MAILPILE_REPO
+
+    chown -R mailpile:mailpile /var/www/$MAILPILE_DOMAIN_NAME/mail
 }
 
 function backup_local_mailpile {