Download the appropriate patch file and place it in your Dotclear directory. Then issue the following command:
zcat [patch-file.gz] | patch -p1 -ul -d .
Dotclear, blog engine
Copyright © Olivier Meunier & Association Dotclear
This program is free software: you can redistribute it and/or modify it under the terms of the
GNU Affero General Public License as published by the Free Software Foundation,
either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program.
If not, see https://www.gnu.org/licenses/.