v2: - use decimals for specifying ipv4 addresses; - added comment to commit message; - test all the parameters in uphlpapi tests (and remove nsi/tests change); - use nsi_enumerate_all() instead of if_nameindex(); - use static array for added addresses and introduce IPV4_ADDR() macro instead of using inet_addr(); - handle the case when some of the static ARP entires are already present from host data.