[trac875] Install the plugin

src/bin/cfgmgr/plugins/Makefile.am

@@ -1,5 +1,5 @@
 SUBDIRS = tests
 EXTRA_DIST = README
 
-# TODO: We need to distribute the .py files and .spec files. We also need to
-# install them. How to do that correctly?
+config_plugindir = @prefix@/share/@PACKAGE@/config_plugins
+config_plugin_DATA = tsig_keys.py tsig_keys.spec