Upstream: fixed fail_timeout and max_fails > 1. Due to peer->checked always set since rev. c90801720a0c (1.3.0) by round-robin and least_conn balancers (ip_hash not affected), the code in ngx_http_upstream_free_round_robin_peer() function incorrectly reset peer->fails too often. Reported by Dmitry Popov, http://mailman.nginx.org/pipermail/nginx-devel/2013-May/003720.html