Make @module parametrized

syslog_ng/files/syslog-ng.conf

@@ -19,7 +19,9 @@ def rule_builder(rule):
 
 @version: ${ syslog_config.get('version', '3.3') }
 
-@module tfjson
+% for module in syslog_config.get('module', ['tfjson']):
+@module ${ rule_builder(module) }
+% endfor
 
 % for inc in syslog_config.get('include', []):
 @include ${ rule_builder(inc) }