Automatic merge from submit-queue

Add -g curl option to hack/lib/util.sh wait_for_url

Add `-g` curl option

```
This  option  switches  off  the "URL globbing parser". When you set this option,
you can specify URLs that contain the letters {}[] without having them being
interpreted by curl itself. Note that these letters are not normal legal URL
contents but they should be encoded according to the URI standard.
```

> Why?

So that IPv6 addresses with `[` and `]`, like `[::1]:8080`, work with that script.
Signed-off-by: André Martins <aanm90@gmail.com>