[Remops] key size migration

[lists at notatla.org.uk]

> > Warning: Can't find OpenSSL version number!
> > Continue anyway? [y] y
> > ./Install: line 756: dc: command not found
> > Warning: This version:  of OpenSSL is not recognized.

> I'm going to uninstall and see if I can figure out what I need to do to get it 
> to recognize OpenSSL without breaking anything else.

You are also lacking dc which is sometimes packaged with bc.