Upstream: unconditional parsing of last_modified_time. This fixes at least the following cases, where no last_modified_time (assuming caching is not enabled) resulted in incorrect behaviour: - slice filter and If-Range requests (ticket #1357); - If-Range requests with proxy_force_ranges; - expires modified.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  $value
#endif

END