Update of IPv6 exercises
Final version of IPv6 exercises
Fix typos in IPv6 exercises
Merge branch 'master' into tempo
Fixed typos
Conflicts:
	book-2nd/mcq-ex/mcq-ipv6.rst
Merge branch 'master' of github.com:obonaventure/cnp3 into tempo
fix typo
fix typos
Merge branch 'master' of github.com:obonaventure/cnp3 into tempo