Deuce doesn't want to add "useless parenthesis" to xbr.c.
Hopefully Clang will just ignore this -Wno-* option?
warning: suggest parentheses around ‘&&’ within ‘||’

Uses "pointyscale" for x3 and x5
Uses xBR from FFmpeg for x2 and x4
HQx is also included, but unused as it's too slow at x4.

MinGW32 is getting long in the tooth and is missing a lot of modern
Windows features as well as having broken headers.  Most people will
be using MinGW-w64 at this point, so add support for it.  Once I
ensure SyncTERM works properly with it, MinGW32 support will be
discontinued.

I suspect this will impact exactly zero people since the reason this
exists is to build the Win32 versions of SyncTERM on FreeBSD.

Changes:
- Explicitly request 32-bit Windows output
- Detect the string "mingw32" anywhere in the hardware description
- Explicitly link with libuuid
- Add a terrible hack to syncterm.c to block wincrypt.h

SDL audio should work from any thread, and on the platforms that care,
SDL video is coddled appropriately.
The only question is around SDL_Quit() in an audio-only build, but we
can punt on that since the default builds will never do that... the only
thing I'm aware of that could be broken that way is tone, which nobody
likes anyway.

ncurses.h is installed as /usr/include/ncursesw/ncurses.h

Win32 now (and it only runs main() from WinMain()).  This shouldn't be
necessary for MSVC builds.

It's not unlikely that any utilities using SDL will have new issues... you
may want to hold off on updates for a bit until this settles unless you
don't use SDL mode.

You will need to perform a clean rebuild.

(e.g. when downloading syncterm-src.tgz)

(that support DCS strings).  With this, CSI = Ps1 ; Ps2 { is deprecated and
should not be used when CTerm is newer than this commit (1.213).

Thanks to Larry Lagomorph for the use of his Mac for this effort!

gmake DONT_CLOBBER_CC=yes CC=mingw32-gcc

X11 and SDL modes share the graphics generation.  A new graphical mode
now only needs an init and keyboard functions to work.

even if the build system would like to use ncurses (ie: NetBSD)

this be fixed), we need allfonts to be included for all ciolib builds.

x_setfont() still needs to be written.

for example)

This is now working.

Move X_HEADERS and X_PATH macros into Common.gmake rather than GNUmakefile
for no good reason.