allow nested ipv4 in ipv6 (BNC#828683)
chagnes
add fixmes for insufficient regex for ipv4 in ipv6
Converted ip_test from Minitest into RSpec

The test is temporarily disabled. It can be enabled once rspec.rpm gets
it into Factory.
Merge pull request #113 from mchf/fix_ipv4_in_ipv6

Fix ipv4 in ipv6