r1699, r1700, r1701, r1702, r1707 merge: upstream parse_header fix and optimization, fix fastcgi_catch_stderr segfault merged in r1524: *) return NGX_HTTP_UPSTREAM_INVALID_HEADER for invalid status *) return NGX_ERROR instead of NGX_HTTP_INTERNAL_SERVER_ERROR in u->parse_header() *) return NGX_HTTP_UPSTREAM_INVALID_HEADER instead of NGX_HTTP_BAD_GATEWAY to go to a next upstream on invalid_header condition *) now ngx_conf_set_str_array_slot() tests NGX_CONF_UNSET_PTR this fixes fastcgi_catch_stderr segfault *) ngx_http_upstream_hide_headers_hash() *) proxy/fastcgi pass_header/hide_header use ngx_http_upstream_hide_headers_hash()

--- a/src/core/ngx_conf_file.c
+++ b/src/core/ngx_conf_file.c
@@ -925,7 +925,7 @@ ngx_conf_set_str_array_slot(ngx_conf_t *
 
     a = (ngx_array_t **) (p + cmd->offset);
 
-    if (*a == NULL) {
+    if (*a == NGX_CONF_UNSET_PTR) {
         *a = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
         if (*a == NULL) {
             return NGX_CONF_ERROR;