DOCS: update release policy to match reality

DOCS/release-policy.md

@@ -1,13 +1,15 @@
 Release Policy
 ==============
 
-Once or twice a month, a new release is cut off of the master branch and is
+Once or twice a year, a new release is cut off of the master branch and is
 assigned a 0.X.Y version number, where X is incremented each time a release
 contains breaking changes, such as changed options or added/removed features,
 and Y is incremented if a release contains only bugfixes and other minor
 changes.
 
 Releases are tagged on the master branch and will not be maintained separately.
+Patch releases may be made if the amount or severity of bugs justify it, or in
+the event of security issues.
 
 The goal of releases is to provide Linux distributions with something to
 package. If you want the newest features, just use the master branch.
@@ -31,13 +33,13 @@ While on master:
 
 - Create signed tag v0.X.Y.
 
-- Add -UNKNOWN suffix to version in `VERSION` file.
+- Push release branch (`release/0.X`) and tag to GitHub.
-
-- Commit changes, push release branch (`release/0.X`) and tag to GitHub.
 
 - Create a new GitHub release using the content of `RELEASE_NOTES` related to
   the new version.
 
+- Readd -UNKNOWN suffix to version in `VERSION` file.
+
 If necessary (to e.g. exclude commits already on master), the release can
 be done on a branch with different commit history. The release branch **must**
 then be merged to master so `git describe` will pick up the tag.
@@ -45,12 +47,14 @@ then be merged to master so `git describe` will pick up the tag.
 Release notes template
 ----------------------
 
-Here is a template that can be used for writing the `RELEASE_NOTES` file.
+Here is a template that can be used for writing the `RELEASE_NOTES` file:
 
 ```markdown
 Release 0.X.Y
 =============
 
+This release requires FFmpeg <ver> or newer.
+
 Features
 --------
 
@@ -59,20 +63,18 @@ New
 
 - List of new features
 
-Removed
+
+Changed
 ~~~~~~~
 
 - List of removed features
 
-Deprecated
+
+Removed
 ~~~~~~~~~~
 
 - List of deprecated features
 
-Behavior
---------
-
-- List of user-visible changes in behavior
 
 Options and Commands
 --------------------
@@ -82,34 +84,37 @@ Added
 
 - List of added options and commands
 
+
 Changed
 ~~~~~~~
 
 - List of changed options and commands
 
-Renamed
-~~~~~~~
-
-- List of renamed options and commands
 
 Deprecated
 ~~~~~~~~~~
 
 - List of deprecated options and commands
 
+
 Removed
 ~~~~~~~
 
 - List of removed options and commands
 
+
 Fixes and Minor Enhancements
 ----------------------------
 
 - List of fixes and minor enhancements
 
-This listing is not complete. There are many more bug fixes and changes. The
+
-complete change log can be viewed by running `git log <start>..<end>` in
+This listing is not complete. Check DOCS/client-api-changes.rst for a history
-the git repository.
+of changes to the client API, and DOCS/interface-changes.rst for a history
+of changes to other user-visible interfaces.
+
+A complete changelog can be seen by running `git log <start>..<end>`
+in the git repository.
 ```
 
 Note that the "Release 0.X.Y" title should be removed when creating a new GitHub