This won't fly if the hostname is an IPv6 address:

bstansberry$ git grep remote://
controller-client/src/main/java/org/jboss/as/controller/client/impl/ProtocolConfigurationFactory.java: configuration.setUri(new URI("remote://" + client.getHost() + ":" + client.getPort()));
host-controller/src/main/java/org/jboss/as/host/controller/RemoteDomainConnectionService.java: configuration.setUri(new URI("remote://" + localHostInfo.getRemoteDomainControllerHost() + ":" + localHostInfo.getRemoteDomainCont
server/src/main/java/org/jboss/as/server/mgmt/domain/HostControllerConnectionService.java: configuration.setUri(new URI("remote://" + hcAddressInjector.getValue().getHostName() + ":" + hcAddressInjector.getValue().getPort()))