updated the tests a bit.
updated README to reflect recent changes.
now we disable subrequest in memory by default.
documented that we work with nginx 0.8.54+ w/o patching.
no longer pfree the upstream chain bufs.
now we can properly unescape "+" to whitespace.
removed the code that modifies subrequests' r->uri because it's very …
…buggy and may produce crashes.
Links to manual