freebsd-relayd: README: Document publishing a tag

README.md

@@ -23,6 +23,8 @@ The latest tested LibreSSL version is 3.7.2.
 
 ## FreeBSD relayd release process
 
+### Publishing a new branch
+
 1. Create a new branch called `release`.
 
    ```sh
@@ -102,3 +104,38 @@ The latest tested LibreSSL version is 3.7.2.
    ```sh
    git push --set-upstream freebsd-relayd "OSMAJOR.OSMINOR.LATEST_COMMIT_DATE"
    ```
+
+### Publish a release from a version branch
+
+1. Make sure that the local repository is clean. Best way is to either work on
+   a fresh clone or by running `git clean -fdx`, which removes all untracked
+   files and directories.
+
+2. Tag a release. The tag should follow this format:
+   `OSMAJOR.OSMINOR.LATEST_COMMIT_DATE-pPATCHLEVEL`, where `PATCHLEVEL` is the
+   next tag number on the version branch (starting with 0),
+   e.g., `7.3.2023.05.09-p0`.
+
+   ```sh
+   git tag OSMAJOR.OSMINOR.LATEST_COMMIT_DATE-pPATCHLEVEL
+   ```
+
+3. Create `relayd-OSMAJOR.OSMINOR.LATEST_COMMIT_DATE-pPATCHLEVEL.tar.gz`
+   with `release-relayd.sh`.
+
+   ```sh
+   ./release-relayd.sh OSMAJOR.OSMINOR.LATEST_COMMIT_DATE-pPATCHLEVEL
+   ```
+
+   Make sure that the archive actually contains all the necessary files to
+   build relayd.
+
+4. Publish the tag.
+
+   ```sh
+   git push --tags
+   ```
+
+5. Create a new release on GitHub based on the newly created tag and attach the
+   `relayd-OSMAJOR.OSMINOR.LATEST_COMMIT_DATE-pPATCHLEVEL.tar.gz` archive to
+   the release page.