Agree with @techee the aim is to be able to simply update changes from ctags automatically. For those parsers where we have a worthwhile change we should push it upstream, thats a nice thing to do anyway, and it then allows us to import the parsers automatically.
`c.c` and others that have big changes are more or a problem and the `geany_` prefix will protect them until such time as they can be synchronised (or replaced with new upstream in the case of C/C++).