- Also remove private requirements as (lib)tinfo are binary
compatible with normal and wide version of (lib)ncurses

- Add ncurses patch 20191214
+ add exit_curses() and exit_terminfo() to replace internal symbols for
leak-checking.
- Let helper script handle.linux call sed command smart

- Add ncurses patch 20191207
+ fix a few warnings for test-package builds
+ add curses_trace(), to replace trace().

- Add ncurses patch 20191130
+ add portability section to curs_getcchar manpage (prompted by
discussion with Nick Black).
+ improve portability discussion of ACS characters in curs_addch
manpage.
+ improve typography for double-quotes in manpages.

- Add ncurses patch 20191123
+ fix typo for MinGW rpm test-package.
+ workaround in rpm specs for NFS problems in Fedora 31.

- Add ncurses patch 20191116
+ modify ncurses/Makefile.in to fix a case where Debian/testing changes
to the ld --as-needed configuration broke ncurses-examples test
packages.
+ drop library-dependency on psapi for MinGW port, since win_driver.c
defines PSAPI_VERSION to 2, making it use GetProcessImageFileName
from kernel32.dll (prompted by patch by Simon Sobish, cf: 20140503).