Generate command-not-found database for Debathena

[broder]

Even if we can't directly use command-not-found as a whichlocker substitute, we should still build a command-not-found database for Debathena packages and ship it as part of debathena-standard.

Otherwise, you end up with this:

evan@tracey:~$ stella
The program 'stella' is currently not installed.  You can install it by typing:
sudo apt-get install stella
stella: command not found

[andersk]

In this case, given that stella is already a required dependency of debathena-standard, it doesn’t help to also include with debathena-standard a database that tells you where to get stella.

Do you think there’s a case in which it does help?

[broder]

Hmm...I guess stella is a bad example here. But there still is at least a little bit of software that we only ship in login-graphical+

Looking at our Contents file, I see things like our acroread wrapper, update_test, xmoira. Maybe that's it.

In any case, if we do decide we want to do this, it looks fairly easy - I think we just drop gdbm .db files in /usr/share/command-not-found/programs.d. command-not-found appears to generate those database files by querying apt - we could probably cargo-cult its code to implement this.