caution regarding the 'libidn2' package with systemd

if you are using systemd (the default parabola system) and have the 'libidn2' package installed, upgrading it could break your system until the next version of systemd is in the repos

if this has already happened to you, here is a temporary work-around:

sudo ln -s /usr/lib/libidn2.so /usr/lib/libidn2.so.0

refer to this bug report for follow-ups: https://labs.parabola.nu/issues/2139