Updated the TODO list.

Core

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- TOS not supported by kernel -> automatically drop routes with TOS<>0

- Remove TOS support?

- config: executable config files

- config: define ipaddr constants?

- config: better default protocol names

- do we really need preconfig?

- static: check validity of route destination?

- device: configuration of interface patterns

- device: what to do if we need to shut down this protocol?

- adding of route: check whether all bits not covered by masklen are zero

- check incoming packets and log errors!!

- check log calls for trailing newlines

- check if all protocols set proper packet priorities and TTL's.

- replace all NUM's by expr's

- replace all NUM, IPA and expr tokens by constant filter expressions

- try compiling with -Wunused

Various ideas