tigervnc fails with nettle-4

[pierre]

See ​https://github.com/tigervnc/tigervnc/issues/2073.

Upstream has not published a patch yet, but it seems all the xxx_digest function calls should be changed to remove the second argument.

[pierre]

Hmmm, server build needs some overhaul:

configure: WARNING: unrecognized options: --disable-xwayland --disable-dmx

And normally, we should use meson anyway. But unfortunately the patch is not adapted to meson.

[pierre]

Building the server needs the same sed as on the Xorg server page.

[pierre]

Fixed at 6304771c79