cols, rows, charwidth, charheight, scaling, vmultiplier.

Only the drivers are allowed to update them, so the drivers don't need to
use locks for them.  The drivers have their own internal copies, so we
don't need vstatlock in the drivers except when updating these values.

display driver interface from the ciolib interface.

console.cterm_fonts_active contains an array of the active slots
xbin_draw()/cleanup() methods now saves and restores the active fonts
- this fixes the problem whereby AnsiView was "losing" the current custom
font after viewing an XBin w/font(s).

isn't available to mingw.  No palette setting for Win32 console. :-(

Also, initial support for Win32 console palette setting.

one second is not always long enough, even over localhost.

in sixel stuff.

For now, just don't grab the lock when doing that...

Also, add macros so we can test without rwlocks on platforms that have them.

have the lock.

to send stale blocks *after* the update is sent (likely from puttext()).

Should fix missing stuff on the screen.

for the "Free credits per day" values in the security levels config.
Much easier to give megabytes and gigabytes of free credits now.

buffer if full. So now everything that uses outcom (including JS
console.write) now includes a retry. The lower-level non-retry outcom()
was renamed _outcom() (and is used by outcom).
Added new Ctrl-A code: Ctrl-AF - enables the blink attribute, but only
if/when a blink font was activated in the terminal. Lower-case 'f' refers
to the normal-intensity blink-font. Uppercase 'F' refers to the high
intensity blink-font. This allows you to mix fonts in text/menu files
and not have annoying blinking text in non-supporting terminals. This is
the first Ctrl-A code to be case-sensitive.

terminal doesn't support loadable palettes.
If fonts aren't supported in the terminal and there's fonts in the XBin,
display a warning about that too.
Updated paren style to match ec's, being polite an' all.

already loaded).
Don't try to display text/menu/logon.* unless logon.asc exists.

if it gets lost.  The UPDATERECT does matter, but we'll see if lost events
start happening again.

Use setpixels() for Sixels
Fix setpixels

It's WAY too slow... the average latency per function is set by the SLEEP(1)
on line 1641... I'm not sure we have a reliable cross-platform sleep more
granular, and 1ms is too slow if we're doing individual pixels.

cterm < 1.167.
Use supports_fonts() in xbin_draw() so we don't bother sending font data
when we know the terminal can't use it, but we still want to display
the xbin image data.

Make send_rectangle() static, nobody else should be calling this.
Clean up a bit... this is still badly broken though, especially clearing
for some reason.

If update_rect() fails, request a complete screen redraw
Move pixel redraw requests out to avoid full screen refreshes when possible
Comment update_rect() better
Consider a character updated of blink or bold is set, and the meaning of blink or bold has changed
Actually update a character if it's changed(!)