Cross Authentication between XYZ instances.

[dbauszus-glx]

Rather than sharing templates between multiple instances it should be possible to connect to different instances [hosts] from the mapp client.

This would allow to add layer to user locale which accesses [query] templates for datasources on instances which can authenticate a request against an ACL associated with a different instance.

This could be possible by generating a token in an instance which has access to another instance.