This allows the pads to be named nicely instead of having just a random string as URL.

For example the draft of the monthly report in july could be located at "https://md.archlinux.org/2023-07_monthly-report" instead of "https://md.archlinux.org/UF9Y235qTRe8XS3qxUVeJA".

https://docs.hedgedoc.org/references/url-scheme/#freeurl-mode



Signed-off-by: Christian Heusel <christian@heusel.eu>