**Steps to reproduce:**
1. Follow steps in T15745 to trigger `EXCEPTION: (PhutilMissingSymbolException)`
2. Read the output and find `For more information, see: https://phurl.io/u/newclasses`
3. Try to access that link
**Expected outcome:**
Link works and redirects to https://we.phorge.it/book/contrib/article/adding_new_classes/
**Actual outcome:**
```
[acko@fedora ~]$ curl -I https://phurl.io/u/newclasses
HTTP/1.1 503 Service Unavailable: Back-end server is at capacity
Connection: keep-alive
```
**Additional comments:**
Either that server (who owns it?) needs to be fixed, or two URIs in Arcanist need to be changed from short URIs to full ones:
```
[acko@fedora arcanist (master $|u=)]$ grep -r "phurl.io" .
./src/runtime/ArcanistRuntime.php: 'https://phurl.io/u/noninteractive'));
./src/init/lib/PhutilMissingSymbolException.php: 'For more information, see: https://phurl.io/u/newclasses',
```
== Known addresses ==
Maybe Phacility will donate this domain to Phorge :D who knows. Waiting for this info, it costs nothing to keep track of this:
| Original URL | Original Destination |
|-----------------------------------|----------------------|
| https://phurl.io/u/httpoxy | https://secure.phabricator.com/T11359 |
| https://phurl.io/u/mailgun | https://secure.phabricator.com/T13669 |
| https://phurl.io/u/overheated | https://secure.phabricator.com/T13274 |
| https://phurl.io/u/php7 | https://secure.phabricator.com/T12101 |
| https://phurl.io/u/reindex | https://secure.phabricator.com/T11932 |
| https://phurl.io/u/repoIdentities | https://secure.phabricator.com/T12164 |
| https://phurl.io/u/sms | https://secure.phabricator.com/T13241 |
(Probably more)