Netstat will sometimes output an IPv6 address that is not
formatted correctly; the address is either truncated or uses
or implies the `::` shorthand notation twice. This yields an
invalid IPv6 address and causes IPAddr.new to choke.
This change guards against invalid IP addresses and ensures they
do not end up in the port resource's entries list.
Signed-off-by: Adam Leff <adam@leff.co>
On Linux, netstat may show a tcp6/udp6 protocol line but include a
v4 address. This happens with AF_INET6 sockets that can accept
both v4 and v6 traffic. The port check was not properly handling
this situation and trying to pass a v4 address to URI bracketed as
if it was a v6 address.
Signed-off-by: Adam Leff <adam@leff.co>
