Prevent equipping weapons and shields when not enough hands are free

[sven-n]

Prevent equipping weapons and shields when not enough hands are free

[halflumi]

Thank you for the excellent summary.

After discovering the staff-shield situation, I did some tests. It appears that the client already prevents most invalid combinations, with shields being the primary exceptions.

I've opened Issue #393 to address these shield cases.

[sven-n]

Yea, however, we should also make sure that the server prevents invalid things - we don't want to trust the client :)

[halflumi]

Indeed. It seems plausible to expand the group checks to include more invalid cases. Just gotta list all of them.