Added support for 6to4 addresses.


git-svn-id: https://svn.tdr.iem.uni-due.de:8443/svn/sctp-misc/trunk/subnetcalc@1937 acdd8558-d4fd-0310-b0a5-8cf3c1ec824a
Version update.


git-svn-id: https://svn.tdr.iem.uni-due.de:8443/svn/sctp-misc/trunk/subnetcalc@1938 acdd8558-d4fd-0310-b0a5-8cf3c1ec824a