Release 0.21.2

# History

## 0.21.2

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.21.2/bootstrap.sh
sudo DOKKU_TAG=v0.21.2 bash bootstrap.sh
```

### Bug Fixes

- #4072: @Schlepptop Fix deprecation warning in config_all

### New Features

- #4061: @josegonzalez Drop go sum and mod files from releases

### Refactors

- #4064: @hugopeixoto Use *_PATH consistently

### Documentation

- #4069: @josegonzalez Scheduler plugins are no longer beta
- #4068: @josegonzalez Official plugins are no longer in beta
- #4066: @ltalirz Add ansible as installation route
- #4063: @josegonzalez Clarify why we stop/rebuild apps during upgrade
- #4040: @fonsp Added link to the buildpack plugin docs
- #4062: @hugopeixoto Rewrite upgrade instructions

docs/development/release-process.md

@@ -29,7 +29,7 @@ The workflow looks like this:
 ```shell
 # having dokku-arch in ../dokku-arch
 vagrant up build-arch
-# wait for "==> build-arch: ==> Finished making: dokku 0.21.1-2 (Mon Feb 22 23:20:37 CET 2016)"
+# wait for "==> build-arch: ==> Finished making: dokku 0.21.2-2 (Mon Feb 22 23:20:37 CET 2016)"
 cd ../dokku-arch
 git add PKGBUILD .SRCINFO
 git commit -m 'Update to dokku 0.9.9'