linux: change IfAddrs structure to be more useful in conjunction with getnameinfo()
linux: change IfAddrs structure to be more useful in conjunction with getnameinfo()

frida/vala,playya/vala,jessevdk/vala,GNOME/vala,rvu95/vala,spidermonkdust/vala,severinh/vala,rvu95/vala,Distrotech/vala,Distrotech/vala,flobrosch/vala-fixes,tjol/vala-tjol,severinh/vala,flobrosch/vala-fixes,frida/vala,severinh/vala,playya/vala,GNOME/vala,xdave/pvala,tjol/vala-tjol,flobrosch/vala-fixes,GNOME/vala,jessevdk/vala,tjol/vala-tjol,frida/vala,frida/vala,frida/vala,GNOME/vala,Distrotech/vala,rvu95/vala,jessevdk/vala,spidermonkdust/vala,spidermonkdust/vala,playya/vala