Log message:
Make the name of nethackdir contain version information (eg. now it's
called nethackdir340). This is to ease the lives of people who wish to
have multiple versions nethack installed at the same time. It is not fully
automated, because doing pkgsrc magic will most likely screw things up
one funny way or another. And we all know that the most important thing
in this world is the nethack scorefile ...

Manually bump version to 3.4.0nb1.

Log message:
Upgrade nethack packages to NetHack 3.4.0

Highlights of the new release:
* numerous bugfixes

* stamina affects ability to throw heavy things
* objects merge in containers
* several small refinements to race/role separation
* more feedback about skill advancement from #enhance command
* "autodig" option
* option for starting without a pet
+ many more, read doc/fixes34.0

Old savegames naturally don't work, so make sure you finish old ones
before upgrading the package.

Also fixes the rest of pkg/15717 by Bernd Ernesti. Solution was the same
as what Thomas Klausner used to fix angband (ie. simply duplicate the
patches)