Name: Constructor copyies too many labels

[Ingo B. <in...@ji...>]

Hey

The Name(String s, Name origin) constructor copies too many labels when
origin has been created by stripping a label.

Example code:
Name origin = Name.fromString("sub.domain.example.");
Name strippedOrigin = new Name(origin, 1);
System.out.println(new Name("prepend", strippedOrigin));

Actual output:
prepend.sub.domain.example.

Expected output:
prepend.domain.example.

Patch with new unit-test is attached.

Regards,
Ingo