[Freeciv-Dev] non-existent technologies

[Jason Dorje Short <vze49r5w@xxxxxxxxxxx>]

We have spoken about removing non-existent technologies from the 
ruleset.  But it just occurred to me this is a problem because the known 
technologies are stored as a bitfield.
There are all sorts of other unnecessary ruleset dependencies in the 
savegames, for instance units are stored by ID rather than by name. 
This can be improved on greatly by avoiding using an "index" when a name 
can be used instead.  But it will still break if a unit is removed, for 
instance.  To get full compatability either a capstring is needed to 
match ruleset and savegame, or the savegame should store all needed 
inforamation about the ruleset it was originally played with.
jason