With the field plugin one can; set the field_allow_config config value to 1, and the config variables are accessible with a "CONFIG-" prefix. That is, if you set a value "foo" in the config file, then you would access it in in the template as <TMPL_VAR CONFIG-FOO>.
field_allow_configconfig value to 1, and the config variables are accessible with a "CONFIG-" prefix. That is, if you set a value "foo" in the config file, then you would access it in in the template as<TMPL_VAR CONFIG-FOO>.