Range filter: changed type for total length to off_t. Total length of a response with multiple ranges can be larger than a size_t variable can hold, so type changed to off_t. Previously, an incorrect Content-Length was returned when requesting more than 4G of ranges from a large enough file on a 32-bit system. An additional size_t variable introduced to calculate size of the boundary header buffer, as off_t is not needed here and will require type casts on win32. Reported by Shuxin Yang, http://mailman.nginx.org/pipermail/nginx/2017-July/054384.html.

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


if [ $PCRE != NONE -a $PCRE != NO -a $PCRE != YES ]; then
    . auto/lib/pcre/make
fi

if [ $OPENSSL != NONE -a $OPENSSL != NO -a $OPENSSL != YES ]; then
    . auto/lib/openssl/make
fi

if [ $ZLIB != NONE -a $ZLIB != NO -a $ZLIB != YES ]; then
    . auto/lib/zlib/make
fi

if [ $NGX_LIBATOMIC != NO -a $NGX_LIBATOMIC != YES ]; then
    . auto/lib/libatomic/make
fi

if [ $USE_PERL != NO ]; then
    . auto/lib/perl/make
fi