There is no reason to use Blowfish nowadays. Given that there are some
other plugins that still provide it, there is especially no reason to
maintain this custom implementation. Also removed the two test scenarios
that used the plugin to avoid promoting the use of this algorithm.
For documentation purposes the new folders ikev1-algs, ikev2-algs,
ikev1-multi-ca and ikev2-multi-ca have been created. Most of the
test cases have now been converted to the vici interface. The
remaining legacy stroke scenarios yet to be converted have been put
into the ikev2-stroke-bye folder.
For documentation purposes some legacy stroke scenarios will be kept
in the ikev1-stroke, ikev2-stroke and ipv6-stroke folders.