FRiCKLE/ngx_cache_purge — pull request #6 by pyh (2011-12-16 11:17:01+00:00)
Title: Fix for cache size calculation

When a file is requested again after it has been purged, nginx will substract
the size of the cached file again in:

http://trac.nginx.org/nginx/browser/nginx/trunk/src/http/ngx_http_file_cache.c?rev=4341#L837

Because of that nginx will use more cache space than it should.

Setting c->node->fs_size to zero fixes the issue.