Service for migrating Firebird 2.5 format to Firebird 3.0

On Libreoffice Devel there is a thread about migration of the already created odb files with 2.5 databases inside (fdb) but also about the forward and backward compatibility of the Firebird backup archive (fbk).
https://lists.freedesktop.org/archives/libreoffice/2016-November/075953.html

Lionel added notes about upgrading in the wiki :

People trade privacy for convenience or the other way round all the time. People that in this case favor convenience can use the hypothetical web service. People that favor privacy can follow the instructions at
https://wiki.documentfoundation.org/Development/Base/FirebirdSQL#Older_Firebird_databases(which the web service should point towards for information).While I'm not exactly lobbying for this web service, we are a volunteer-driven organisation and if Tamás feels like doing it, all the merrier.