support HEAD in proxy cache
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index ca1fbea..26f24b3 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -691,7 +691,7 @@
 };
 
 
-static ngx_str_t  ngx_http_core_get_method = { 3, (u_char *) "GET " };
+ngx_str_t  ngx_http_core_get_method = { 3, (u_char *) "GET " };
 
 
 void