[Cin] Debian 11

[Sam]

Andrew (or maybe other supporters) do you have the possibility to see 
which packages are necessary for Debian 11 to install Cinelerra 
correctly? We currently have this ticket still open.

https://www.cinelerra-gg.org/bugtracker/view.php?id=536

Unfortunately I don't know enough about the dependencies. I don't want 
to bother Phyllis in her grief with it. Maybe we can modify the 
installation routine to show the right packages for Debian 11.

Sam