arg: flags 0x2 family 2 socktype 0 protocol 0 addrlen 0 host localhost serv http
ai1: flags 0x2 family 2 socktype 2 protocol 17 addrlen 16 host 127.0.0.1 serv http
ai2: flags 0x2 family 2 socktype 1 protocol 6 addrlen 16 host 127.0.0.1 serv http

arg: flags 0x2 family 24 socktype 0 protocol 0 addrlen 0 host localhost serv http
ai1: flags 0x2 family 24 socktype 2 protocol 17 addrlen 28 host ::1 serv http
ai2: flags 0x2 family 24 socktype 1 protocol 6 addrlen 28 host ::1 serv http