square/okhttp — pull request #1004 by tomrozb (2014-07-27 21:34:39+00:00)
Title: Allow duplicated charsets in MediaType

Do not fail with `IllegalArgumentException` if there are multiple charsets but the charsets are just duplicates.

We can ignore duplicated charsets. Here's an example that caused crash of my app:

```
java.lang.IllegalArgumentException: Multiple charsets: text/html; charset=utf-8; charset=utf-8
```