pagespeed/ngx_pagespeed — pull request #162 by jeffkaufman (2013-01-31 15:46:53+00:00)
Title: readme: support experiment resource urls

A normal .pagespeed. url looks like:

256x192vPuzzle.jpg.pagespeed.ic.alA0AdlR-2.jpg

If someone turns on RunExperiment, however, we generate urls like:

256x192vPuzzle.jpg.pagespeed.a.ic.alA0AdlR-2.jpg
256x192vPuzzle.jpg.pagespeed.b.ic.alA0AdlR-2.jpg

The new section is always a single letter between a and z. We need to catch
these and pass them through to PageSpeed.