> Could you please explain what tags someone would use then,
> to get - 1.4, 1.4.1, and 1.4-willbe-2 ?  I haven't seen a good
> document explaining the tags used anywhere.

Certainly.

1.4		netbsd-1-4-RELEASE
1.4.1		netbsd-1-4-PATCH001
1.4-willbe-2	netbsd-1-4

The latter is the "1.4 release branch tag".  When 1.4.2 is
released, it will be tagged with netbsd-1-4-PATCH002.

Regards,

- H=E5vard