rpolzer prefers to be uploader, so mteich will stay maintainer.

- make rpolzer maintainer, mteich uploader to avoid NMUs.
- remove whitespace at EOL in changelog.
- make changelog entry fit the lintian limit of 80 characters.

lintian-overrides only contained an override for binary-without-manpage,
but xsecurelock ships a manpage since 794a8e00 so we don't need that
override anymore.

Not very fancy yet, but should do for now.

Contribute the example saver for displaying livestream feeds.

Internal reference: b/130370819.

Now the colors are only hardcoded in one place, making it easier to override them.

Not doing so but running xsecurelock via shell expansion means that the shell
will keep holding on to the sleep lock FD, preventing suspend.

(cleaner)

The easiest way to do that was to execl() a separate binary for the
placeholder (thereby closing all close-on-exec file descriptors, even
those we don't control, e.g. X11's), also making "ps" more descriptive
about what this process is for, and making sure any e.g. internal mutexes
by libraries we use are freed.

Fixes "systemd does not suspend laptop on closing the lid".

Otherwise the sigsuspend() call to wait for SIGCHLD does nothing and just hangs.

Also, refactor to prevent this issue from happening in the future.

$0 didn't contain the full path, so exec failed.

Fixes killing saver children twice twice.