allow try_files in server context

src/http/ngx_http_core_module.c

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 4350ab1..ca9bc4f 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -542,7 +542,7 @@
       NULL },
 
     { ngx_string("try_files"),
-      NGX_HTTP_LOC_CONF|NGX_CONF_2MORE,
+      NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_2MORE,
       ngx_http_core_try_files,
       NGX_HTTP_LOC_CONF_OFFSET,
       0,