pagespeed/ngx_pagespeed — pull request #439 by oschaaf (2013-07-14 11:57:32+00:00)
Title: shutdown: fix segfault when shutting down a worker process

Remove the deferred cleanup, as in ngx_pagespeed the fetcher
is owned by the RewriteDriverFactory.

Fixes the backtrace pointing to
net_instaweb::RewriteDriverFactory::Deleter
at https://github.com/pagespeed/ngx_pagespeed/issues/367