wine64 used to be the way to run a 64-bit wineserver. It was removed due
to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1029536 despite
that bug report being about a bug in an unrelated symlink -- apparently
there's no recommended solution to starting a specific bitness of wine
on demand. The automagic `wine` I believe creates a wineprefix with
both, which is... probably not exactly efficient here? But whatever, not
worth fighting it. Just get this more or less working again.
D lang compilers have an option -release (or similar) which turns off
asserts, contracts, and other runtime type checking. This patch wires
that up to the b_ndebug flag.
Fixes#7082