SSLv6 is a custom version of SSL modules derived 
from original SSL. Will be done away with once 
the author releases a version of his own. 

IO::Socket:SSL has some changes but they are untested
and the freebsd port has not been updated. 

IO::Socket::Multicast6 - X-Bone extended IO::Socket::Multicast
to support IPv6 and looking at ways of putting it into the 
CPAN system.

Socket6 - The Socket6 has been updated to 0.14 version. Socket6-devel
should be removed.