travis: add an lsmod
travis: we cant actually run the tests there due to tuntap being unavailable within their OpenVZ containers, so disable this.

See travis-ci/travis-ci#1503
getifaddrs now returns IPv6 as well, with an updated interface.
Regenerate OASIS.
Updated travis.
Updated CHANGES.
Update OASIS for debug mode.
Do not use OPAM 1.1.0.
getifaddrs can return a NULL pointer.
field ifa_addr of struct ifaddrs can be NULL.
Restored OASIS and Travis settings.
Improved return type for ifaddr, set_ipv4 is now set_ipaddr.
New getifaddrs interface.
Regen OASIS.
Backward compat.
Merge pull request #6 from vbmithr/master

get IPv6 with getifaddrs as well
travis: do not test with OCaml < 4.X
Update .travis.yml as well.
Merge pull request #7 from vbmithr/master

travis: do not test with OCaml < 4.X
Regenerate with OASIS 0.4.2