lufi mailing links with 'send from this server' breaks

[ptrhere]

hey,
i ran into an issue when trying to send links by email (sent from lufi backend)

it seems the backend checks the proposed body message for inclusion of these file-links,
but this test fails, and thus this email is impossible to send.

i investigated a bit and found out the backend perl script /var/www/lufi/lib/Lufi/Controller/Mail.pm generates this error
as it tries to find a wrong url (https://server.domain/lufir/ where we would expect https://server.domain/lufi/r)

i tried setting the prefix in lufi.conf manually to include a trailing slash to the path prefix
prefix => '/lufi/'
which works,
i guess this could be added to lufi.conf.template in ths yunohost package