Cache: fixed caching of intercepted errors (ticket #1382). When caching intercepted errors, previous behaviour was to use proxy_cache_valid times specified, regardless of various cache control headers present in the response. Fix is to check u->cacheable and use u->cache->valid_sec as set by various cache control response headers, similar to how we do this in the normal caching code path.

# 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"