merge fastcgi_cache_key
diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 773707d..dfa5346 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -2064,6 +2064,10 @@
ngx_conf_merge_ptr_value(conf->upstream.cache_valid,
prev->upstream.cache_valid, NULL);
+ if (conf->cache_key.value.data == NULL) {
+ conf->cache_key = prev->cache_key;
+ }
+
#endif
ngx_conf_merge_value(conf->upstream.pass_request_headers,