Albeit the parsing routine of server.c:validate_auth_options() copes with what may come through DVM created instances as of now, it cannot be called theoretically correct.

I actually faced this fact when tried to use a volume name with "." in it, for auxiliary purposes. While the auth modules themselves are happy with the dotty volname, validate_auth_options() could not make sense of it.

I propose therefore a more exact and simpler version (which handles "." :O).