square/okhttp — pull request #222 by swankjesse (2013-06-29 16:49:31+00:00)
Title: Warpspin's new isAlive detector.

We had something like this a long time ago in AOSP and
decided to take it out in favor of just recovering from
failures.

I'm putting it back in, but just for POST requests, since
those are much more difficult to recover from if something
goes wrong.