The following sysprops can optionally be specified to override the corresponding hard-coded default config file names:

jboss.server.default.config
jboss.host.default.config
jboss.domain.default.config

For details, see:

https://github.com/jbossas/jboss-as/pull/1455

We need to add support for these. Discovery logic should be:

String serverConfig = serverCmdLine.getClassOption(SERVER_CONFIG_OPTION);
if (serverConfig == null) {
   serverConfig = serverCmdLine.getSystemProperty("jboss.server.default.config");
}
if (serverConfig == null) {
   serverConfig = "standalone.xml";
}

The first if-block is the one that needs to be added for all three config files.