Time parsing cleanup. Nuke NGX_PARSE_LARGE_TIME, it's not used since 0.6.30. The only error ngx_parse_time() can currently return is NGX_ERROR, check it explicitly and make sure to cast it to appropriate type (either time_t or ngx_msec_t) to avoid signedness warnings on platforms with unsigned time_t (notably QNX).

--- a/src/core/ngx_parse.h
+++ b/src/core/ngx_parse.h
@@ -13,9 +13,6 @@
 #include <ngx_core.h>
 
 
-#define NGX_PARSE_LARGE_TIME  -2
-
-
 ssize_t ngx_parse_size(ngx_str_t *line);
 off_t ngx_parse_offset(ngx_str_t *line);
 ngx_int_t ngx_parse_time(ngx_str_t *line, ngx_uint_t is_sec);