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.

* Implement disco mode

* Add option to hide the password completely

* Update README.md

* Update README with new version of env variables (not yet implemented)

* Fix const-correctness

* Add XSECURELOCK_PASSWORD_PROMPT flag + 3 bonus prompts

* Remove XSECURELOCK_PASSWORD_PROMPT from readme

* Add "REMOVE IN v2" inside XSECURELOCK_PARANOID_PASSWORD setting name

* Revert accidental PARANOID_PASSWORD_MIN_CHANGE change

* Wrap _Static_assert in a macro

* Replace emoji escape codes with actual values

* Rename ShowFromArray function

* Use ++ as prefix operator

* Remove useless parentesis

* Move flag variables inside main

* Update README with samples for the different XSECURELOCK_PASSWORD_PROMPT values

Makes following semantic versioning easier.

Behaves somewhat better if the value is low; still could not get a zero value
to work, as X11 then still wakes up the screen on key-release events.

Note that after this change, SIGUSR1 is only sent if
XSECURELOCK_SAVER_RESET_ON_AUTH_CLOSE is enabled, and savers
should ideally handle it by soft-resetting the saver (implemented in
saver_xscreensaver only for now); not handling it will cause a hard-reset
of the saver by restarting it from scratch.

Fixes #75.

Previously uscan would download the github-generated source tarball
which is missing the version.c file. This file is created by `make
dist`, so with this change we update debian/watch to refer to the
tarballs created by `make dist` so uscan downloads the correct tarball
that contains version.c.

This script is only useful on master and seemingly breaks gbp, so we're removing
it from the debian branch now.

That script absolutely works from a release tarball.

Make it run at 60fps by default now, no longer 112fps when dithering.

Code file copyright headers have it too, so only listing the persons in
debian/copyright is inconsistent.

Fix the displaymarker sometimes only moving by one character when starting from column zero (empty PW).