Update to nethack 3.4.0 after repocopying from nethack33{,-*}.
Unify the variant ports and make them slave ports of the master port,
nethack34.
Unbreak nethack34-gnome.
PR: ports/36576, ports/36880
Submitted by: KATO Tsuguru <tkato@prontomail.com>,
Jan Stocker <Jan.Stocker@t-online.de> (MAINTAINER of -gnome)