nameif renames network interfaces based on mac addresses. When no arguments are
/etc/mactab is read. Each line of it contains an interface name and a Ethernet MAC
address. Comments are allowed starting with #.
Otherwise the interfaces specified on the command line are processed.
nameif looks for the interface with the given MAC address and renames it to the
-s argument is given all error messages go to the syslog.
-c argument is given with a file name that file is read instead of /etc/mactab.
nameif should be run before the interface is up, otherwise itll fail.