Multiple addresses support

[MaciejBaj]

With the current implementation of address function, there is no possibility to retrieve multiple addresses assign to the interface. For configuration like this:

eth0: 
   [ { address: '10.0.2.15',
       netmask: '255.255.255.0',
       family: 'IPv4',
       mac: '08:00:27:88:0c:a6',
       internal: false },
     { address: '10.0.2.16',
       netmask: '255.255.255.0',
       family: 'IPv4',
       mac: '08:00:27:88:0c:a6',
       internal: false },
     { address: 'fe80::a00:27ff:fe88:ca6',
       netmask: 'ffff:ffff:ffff:ffff::',
       family: 'IPv6',
       mac: '08:00:27:88:0c:a6',
       scopeid: 2,
       internal: false } ] }

there is no possibility to gather both assign addresses (10.0.2.15 and 10.0.2.16).