[keycloak-dev] Shortening URLs

Our URLs are quite long, examples: * http://localhost:8080/auth/realms/master/protocols/openid-connect/login * http://localhost:8080/auth/realms/master/account We could remove the 'realms' part and 'protocols' parts couldn't we? * http://localhost:8080/auth/master/oidc/login * http://localhost:8080/auth/master/account That would require moving everything under a realm and I guess we'd need to hard-wire the protocols, but I think that should be fine. We also need to make sure we can just the root context: * http://localhost:8080/master/oidc/login * http://localhost:8080/master/account We can also introduce other mechanisms to select the realm. For example a server with single realm can just omit it altogether: * http://localhost:8080/oidc/login * http://localhost:8080/account And we could allow setting what domains uses what realms: * http://keycloak-master/oidc/login * http://keycloak-other/oidc/login