* src/drv_initscripts (drv_lookup_by_mac_string): filter out slaves
* src/drv_initscripts (drv_lookup_by_mac_string): filter out slaves

If eth0 is enslaved to br0, they will have the same MAC address; we only
want to report the toplevel interface, i.e. br0

hallyn/netcf,osier/netcf,seanbruno/fbsd-netcf,hallyn/netcf,emaste/netcf,hallyn/netcf,osier/netcf,osier/netcf,seanbruno/fbsd-netcf,battlemidget/deprecated-mingw32-netcf,emaste/netcf,battlemidget/deprecated-mingw32-netcf,emaste/netcf,seanbruno/fbsd-netcf