Release 0.22.6

# History

## 0.22.6

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.22.6/bootstrap.sh
sudo DOKKU_TAG=v0.22.6 bash bootstrap.sh
```

### Bug Fixes

- #4295: @josegonzalez Update ps subcommands and triggers

### New Features

- #4286: @josegonzalez Add support for templated CHECKS files
- #4294: @josegonzalez Enhance ssh client logging output
- #4291: @josegonzalez Add log aggregation support via Vector
- #4288: @josegonzalez Add the pid of the dokku process to event logs
- #4289: @josegonzalez Clean precheck tmp file on exit

### Refactors

- #4287: @josegonzalez Refactor parallelized goroutines to use error groups

### Documentation

- #4292: @thomasfedb Update docs to note support for Ubuntu 20.04
- #4293: @ltalirz Fix path in persistent storage docs

### Other

- #4290: @josegonzalez Add support for debug logging plugin trigger stderr and stdout

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 0.22.5-2 (Mon Feb 22 23:20:37 CET 2016)"
+# wait for "==> build-arch: ==> Finished making: dokku 0.22.6-2 (Mon Feb 22 23:20:37 CET 2016)"
 cd ../dokku-arch
 git add PKGBUILD .SRCINFO
 git commit -m 'Update to dokku 0.9.9'