I noticed when running `make xconfig` that in the "Appletalk
Devices" dialog there is the choice of using either "IP to
Appletalk-IP Ecapsulation Support" or the "Appletalk-IP to
IP Dcapsulation Support". According to the "Help" for these
options they are mutually exclusive (you may only say "Y" to
one of them), yet they are both set to "Y" by default.
Shouldn't there be some other default since having them both
set to "Y" apparently is NOT allowed?
Reported this to the kernel hackers.