Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/docs/release_checklist.md

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+# Release checklist
+
+When changing the version, run `build-scripts/update-version.sh X Y Z`,
+where `X Y Z` are the major version, minor version, and patch level. So
+`3 8 1` means "change the version to 3.8.1". This script does much of the
+mechanical work.
+
+
+## New feature release
+
+* Update `WhatsNew.txt`
+
+* Bump version number to 3.EVEN.0:
+
+    * `./build-scripts/update-version.sh 3 EVEN 0`
+
+* Do the release
+
+* Update the website file include/header.inc.php to reflect the new version
+
+## New bugfix release
+
+* Check that no new API/ABI was added
+
+    * If it was, do a new feature release (see above) instead
+
+* Bump version number from 3.Y.Z to 3.Y.(Z+1) (Y is even)
+
+    * `./build-scripts/update-version.sh 3 Y Z+1`
+
+* Do the release
+
+* Update the website file include/header.inc.php to reflect the new version
+
+## After a feature release
+
+* Create a branch like `release-3.4.x`
+
+* Bump version number to 3.ODD.0 for next development branch
+
+    * `./build-scripts/update-version.sh 3 ODD 0`
+
+## New development prerelease
+
+* Bump version number from 3.Y.Z to 3.Y.(Z+1) (Y is odd)
+
+    * `./build-scripts/update-version.sh 3 Y Z+1`
+
+* Do the release