limit_conn before SSL handshake

[Alan Hamlett]

Currently the limit_conn and limit_conn_zone config options have this
context (can only be used inside these config scopes).
context: http,server,location
http://nginx.org/en/docs/http/ngx_http_limit_conn_module.html#limit_conn

Those 2 configs have no way to prevent nginx from negotiating the SSL
handshake, since they only apply after nginx has a HTTP request.
This means the nginx server can become CPU bound by spending all it's time
in SSL only to have the request dropped by limit_conn.

How about making limit_conn and limit_conn_zone be applied before the SSL
handshake so precious CPU isn't spent negotiating an SSL session when the
connection limit will end up blocking the request anyway?

-- 
Alan
http://ahamlett.com/
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