move out-of-date hints files to the outdated folder.
rename the hints files, and hints/include files that are currently
named *.2020 to *.370 (next release number).
Avoid the warning that tmpname should be replaced by mkstemp by
replacing tmpname with mkstemp. lua has code to do that but it isn't
trivial to activate while leaving the lua distribution unmodified.
[I've no idea whether nethack's usage even results in liblua ever
creating any temporary files.]
Using nethack's hints to pass -DLUA_USE_POSIX from top Makefile to
lib/lua-$(LUA_VERSION)/Makefile has been tested, building liblua.a
on linux with that has not.
Some platforms compile ncurses in such a way that the tinfo library needs to
be separately linked in (e.g. Gentoo).
The tinfo library is a low-level library being used by and bundled with
ncurses.
Adding '-ltinfo' to WINTTYLIB in the hint files was considered the most robust
solution to this problem. This still works on systems with ncurses 5.9.
Using pkg-config was ruled out as the default build of ncurses doesn't install
the necessary files.
