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