Upstream: cached connections now tested against next_upstream. Much like normal connections, cached connections are now tested against u->conf->next_upstream, and u->state->status is now always set. This allows to disable additional tries even with upstream keepalive by using "proxy_next_upstream off".

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  0
#endif

END