JakeWharton/DiskLruCache — pull request #24 by jonasfa (2012-10-08 22:28:18+00:00)
Title: Allow keys with dashes (-) so one can use the return of an object's .hashCode() as key

Useful for HTTP caching and other cases.

For instance:

```
URL url = new URL("http://host/path");
String myKey = String.valueOf(url.hashCode()); // may be a negative integer
```