HOWTO make a service release

1) Prepare release tag

Fetch maintainer scripts from https://git.openwrt.org/maintainer-tools.git
Ensure that GPG and usign keys are published and working according to https://openwrt.org/docs/guide-user/security/keygen
Fetch pristine source tree, best do a new local clone, e.g.
```
git clone git@git.openwrt.org:openwrt/openwrt.git
git checkout openwrt-19.07
```
- Replace branch name with appropriate one
Place maketag.sh script from maintainer repo into the clone
Execute ./maketag.sh -k 818021EBB6C9ECDA -v 19.07.0-rc2
- Replace key ID and version number with appropriate values
Review auto generated commits with git log -p -2
- Should show one setting adjustment and one setting revert commit
Review auto generated tag with git show v19.07.0-rc2
- Should show a git tag with associated GPG info and commit references
- Replace version number accordingly
Push auto generated commits and tag to the remote:
```
git push origin openwrt-19.07
git push --follow-tags origin refs/tags/v19.07.0-rc2:refs/tags/v19.07.0-rc2
```
- Replace version numbers and branch name accordingly
- Review https://git.openwrt.org/?p=openwrt/openwrt.git;a=tags

Log into http://buildbot.openwrt.org/openwrt-19.07/images
- Use credentials provided by admin
Open the “Builders” page
- Scroll down to “Force All Builds” form
Fill out the form
- Enter “Trigger release builds” as reason
- In the first “Name:” field enter tag
- In the first “Value:” field enter 19.07.0-rc2
  - Replace version number accordingly
  - Note the missing v prefix! Enter only the number
- Click “Force Build”
Review buildbot activity in waterfall view

Copy make-changelog.pl from maintainer repo into the local clone
Execute ./make-changelog.pl v17.01.4..v17.01.5
- Replace version numbers accordingly
- Revision range should cover all commits since last release
- Suggest to redirect stdout to a file
Copy resulting change log into https://openwrt.org/releases/17.01/changelog-17.01.5
- Replace base and minor versions accordingly
- Take care to preserve the first introductory paragraph in the wiki pages
- Ideally use a prior change log page as template

Once the release builds are finished and uploaded to https://downloads.openwrt.org/releases/17.01.5/targets/ …
… head to release series parent page at https://openwrt.org/releases/17.01/start
- Replace base version accordingly if needed
Update timeline and latest version number, links etc. to point to the latest release
Start preparing release notes at https://lede-project.org/releases/17.01/notes-17.01.5
- Replace version accordingly
- Mention most important changes since last release
- Use old release note pages as template
- Good technique is to skim through detailed change log and taking note of outstanding commits or series of commits

Write an announcement to the mailing lists
- Use http://lists.infradead.org/pipermail/openwrt-devel/2017-October/009401.html as template
Write an announcement in the forum
- Use https://forum.openwrt.org/t/lede-v17-01-4-service-release/7573 as template
- “Pin” the topic for 4-8 weeks
Update IRC channel topics