While I do not agree with _every_ style change, this will force Dokku to have consistent formatting across all shell scripts, which is arguably a Good Thing™.
The command used to reprocess everything is:
```shell
shfmt -l -bn -ci -i 2 -w .
```
This will allow us to kill stale proxy configuration within apps, which is critical during application renames.
- redirect rmdir output to dev-null
- trigger a proxy-clear-config (new trigger) when renaming an application
- The configuration will be rebuilt during the later `ps_rebuild`
Closes#3231
