add dynamic module capability

nginx-upstream-fair can now be compiled as a dynamic module

gnosek#21

Author: itoffshore

config

@@ -1,3 +1,12 @@
 ngx_addon_name=ngx_http_upstream_fair_module
-HTTP_MODULES="$HTTP_MODULES ngx_http_upstream_fair_module"
-NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_upstream_fair_module.c"
+
+if test -n "$ngx_module_link"; then
+    ngx_module_type=HTTP
+    ngx_module_name=ngx_http_upstream_fair_module
+    ngx_module_srcs="$ngx_addon_dir/ngx_http_upstream_fair_module.c"
+
+    . auto/module
+else
+    HTTP_MODULES="$HTTP_MODULES ngx_http_upstream_fair_module"
+    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_upstream_fair_module.c"
+fi