Upstream: do not unnecessarily create per-request upstreams. If proxy_pass (and friends) with variables evaluates an upstream specified with literal address, nginx always created a per-request upstream. Now, if there's a matching upstream specified in the configuration (either implicit or explicit), it will be used instead.

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


# aCC: HP ANSI C++ B3910B A.03.55.02

# C89 mode

CFLAGS="$CFLAGS -Ae"
CC_TEST_FLAGS="-Ae"

PCRE_OPT="$PCRE_OPT -Ae"
ZLIB_OPT="$ZLIB_OPT -Ae"