xslt_stylesheet should be valid for location only

src/http/modules/ngx_http_xslt_filter_module.c

diff --git a/src/http/modules/ngx_http_xslt_filter_module.c b/src/http/modules/ngx_http_xslt_filter_module.c
index 7165fc8..d7d8e40 100644
--- a/src/http/modules/ngx_http_xslt_filter_module.c
+++ b/src/http/modules/ngx_http_xslt_filter_module.c
@@ -138,7 +138,7 @@
       NULL },
 
     { ngx_string("xslt_stylesheet"),
-      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+      NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
       ngx_http_xslt_stylesheet,
       NGX_HTTP_LOC_CONF_OFFSET,
       0,