It documents where the xbm file comes from.

Fixes #90.

Now it compiles as C89 again.

Fixes #85.

That way, when a user ever sees it, they see the cause of the problem:

INCOMPATIBLE COMPOSITOR,
PLEASE FIX!

Then we can safely show Ctrl+Alt+O on the screen :)

At least one user tried to press zero instead of oh; changed Ctrl-Alt-O
(upper case) to Ctrl-Alt-o (lower case) to disambiguate.

Should fix crash issues with nvidia driver.

Credit goes to tommie.

This doesn't make them work, we still need to switch to another font
renderer, but this fixes the crash of auth_x11 when using them.

See bug #83.

This already closes lots of context menus and makes the force grab code hit less.

Makes sure our and X11's idle timers are more consistent. Should normally
only have had a delta of below 100ms though (WATCH_CHILDREN_HZ is 10,
and XPending flushes).

Fixes "xsecurelock while slock is running may unmap all your windows".

No behavioral change.

That way, helpers can still expect to live in that directory.

INTERNAL_REFERENCE=140864646

Fixes "xsecurelock gets into non-unlockable state if Debian package is reinstalled/upgraded while the screen was locked".

INTERNAL_REFERENCE=140864646

Also, provide a general variable
(XSECURELOCK_ALLOW_LOCKING_IF_INEFFECTIVE) to bypass these checks,
when wanting to develop XSecureLock itself on a Chromebook (Wayland!) for
example.

Works around issues in third-party authentication modules.

Fixes #39.

Fixes #81.

This shouldn't be necessary but may work around graphics driver bugs.

Fixes #80.

For now they're C99-only; possibly to be fixed later.

Also, fix plurals of -moji words.