Log Message:
Update to 2.15

Upstream changes:
2.15 Wed Nov 14 23:22:07 CET 2012
	- use the recurse parameter to also limit the number of retries to be
          done, avodiing endless loops with broken servers, as reported
          by Carl Chambers.

2.14 Sun Apr 22 14:57:51 CEST 2012
	- Time::Local::timegm croaks on out-of-range values. Don't let
          this disturb AnyEvent::HTTP (reported by: tell me, I forgot...).