feature: now this module can be compiled as a dynamic module with ./c…

…onfigure --add-dynamic-module=PATH in NGINX 1.9.11+. thanks Sjir Bagmeijer for the original patch in #44.

config

@@ -16,6 +16,17 @@ HEADERS_MORE_DEPS="                                                         \
                 $ngx_addon_dir/src/ngx_http_headers_more_util.h             \
                 "
 
-HTTP_AUX_FILTER_MODULES="$HTTP_AUX_FILTER_MODULES $ngx_addon_name"
-NGX_ADDON_SRCS="$NGX_ADDON_SRCS $HEADERS_MORE_SRCS"
-NGX_ADDON_DEPS="$NGX_ADDON_DEPS $HEADERS_MORE_DEPS"
+if test -n "$ngx_module_link"; then
+    ngx_module_type=HTTP_AUX_FILTER
+    ngx_module_name=$ngx_addon_name
+    ngx_module_incs=
+    ngx_module_deps="$HEADERS_MORE_DEPS"
+    ngx_module_srcs="$HEADERS_MORE_SRCS"
+    ngx_module_libs=
+
+    . auto/module
+else
+    HTTP_AUX_FILTER_MODULES="$HTTP_AUX_FILTER_MODULES $ngx_addon_name"
+    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $HEADERS_MORE_SRCS"
+    NGX_ADDON_DEPS="$NGX_ADDON_DEPS $HEADERS_MORE_DEPS"
+fi