Probably outdated docs

[AMDmi3@…]

​http://nginx.org/en/docs/http/ngx_http_uwsgi_module.html#uwsgi_cache_path says:

"In addition, all active keys and information about data are stored in a shared memory zone, whose name and size are configured by the keys_zone parameter. One megabyte zone can store about 8 thousand keys."

In practice, my 1MB cache stopped growing on 4k entries (still far from max_size) so I suspect that the documentation may be oudated and the "about 8 thousand keys" should be changed to "about 4 thousand keys"

[Yaroslav Zhuravlev <yar@…>]

In 2069:fc3ba2e76974/nginx_org:

Documented size of keys_zone for commercial version (trac #1286).