Release 0.17.3

# History

## 0.17.3

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.17.3/bootstrap.sh
sudo DOKKU_TAG=v0.17.3 bash bootstrap.sh
```

### Bug Fixes

- #3570: @znz Fix typos in trace help

### New Features

- #3574: @josegonzalez Add support for pulling app status from scheduler plugins
- #3571: @znz Simplify hostname_regex

docs/assets/versions.json

@@ -14,6 +14,6 @@
     "0.14.6",
     "0.15.5",
     "0.16.4",
-    "0.17.2"
+    "0.17.3"
   ]
 }