Convert a config file to build a dynamic module

Author: hnakamur

config

@@ -1,3 +1,13 @@
 ngx_addon_name=ngx_http_sorted_querystring_module
-HTTP_MODULES="$HTTP_MODULES $ngx_addon_name"
-NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/$ngx_addon_name.c"
+SORTED_QUERYSTRING_SRCS="$ngx_addon_dir/ngx_http_sorted_querystring_module.c"
+
+if [ -n "$ngx_module_link" ]; then
+    ngx_module_type=HTTP
+    ngx_module_name="$ngx_addon_name"
+    ngx_module_srcs="$SORTED_QUERYSTRING_SRCS"
+
+    . auto/module
+else
+    HTTP_MODULES="$HTTP_MODULES $ngx_addon_name"
+    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $SORTED_QUERYSTRING_SRCS"
+fi