HEX_DIGITS         43 modules/http/http_etag.c             *next++ = HEX_DIGITS[next_digit];
HEX_DIGITS         47 modules/http/http_etag.c             *next++ = HEX_DIGITS[next_digit];
HEX_DIGITS         51 modules/http/http_etag.c     *next++ = HEX_DIGITS[u & (apr_uint64_t)0xf];