[3.1] drop split-stack and V6ONLY magics

lör 2010-05-15 klockan 10:42 +0200 skrev Henrik Nordström:

> But I honestly do not see why we need to configure run test for any of
> this, other than that we can compile. A Squid compiled with IPv6 support
> will now run just fine even if the IPv6 stack is not there at runtime,
> and the only use of IPV6_V6ONLY in 3.1 is to enable mapped mode in case
> it's not the default. Having run test in configure should be avoided as
> much as possible as it makes it more or less impossible to
> cross-compile.

Proof of concept patch attached for dropping the split-stack magics from
3.1. Please comment.

Regards
Henrik