* ubuntu22-appimage still cannot be built with buildah.
* But at least CI goes through now with PDCursesMod v4.5.4.

* Should fix scrolling in the Wincon port.
  CTRL modifiers are still "sticky" in WinGUI, though, even though it was supposed
  to be fixed long ago.
* Also, there is now a Makefile to build/reproduce the freebsd14-sciteco and freebsd14-msys-sciteco
  containers via buildah.
  freebsd14-osx-sciteco and ubuntu22-appimage are still TODO.

Should hopefully fix errors about invalid $TERM.

* There already was --enable-static-executables which would pass `-static`
  to the linker, but it did not help with library dependencies (that have to be
  pulled in transitively when linking statically).
  pkg-config does have `--static` support though.
* Now all pkg-config found libraries will use `pkg-config --static` when
  --enable-static-executables, which simplifies linking statically.
  Previously you'd either need to set PKG_CONFIG="pkg-config --static"
  or you would have to manually list library dependencies.

* We wouldn't detect the correct flags (ax_cv_curses_enhanced and ax_cv_curses_color)
  when CURSES_CFLAGS and CURSES_LIBS are given.
* Allows to force ncurses to the SDK/system one when building
  for OS X (20-freebsd14-osx-sciteco).

This is what the Github CI workflow did previously.

* In contrast to the old Github workflow, we can no longer create pkgs,
  but instead create tar balls. You don't necessarily have to unpack
  it into the root, though, since the binaries are relocatable.
* We cannot execute the resulting binaries, so the testsuite is no
  longer run under OS X. It could be executed with Darling, but only
  under Linux.
* Resulting binaries are currently apparently fully statically linked.

* They were broken because of a confirmed Clang bug.
* As a workaround, we are switching from libstdc++ to libc++.
  This is not the default under MINGW64, but also works.
* See also https://github.com/HolyBlackCat/quasi-msys2/issues/44