snabbnfv traffic: Fix command-line argument parsing
snabbnfv traffic: Fix command-line argument parsing

The optional arguments (only -B) were treated as positional arguments.

wingo/snabbswitch,javierguerragiraldez/snabbswitch,kbara/snabb,justincormack/snabbswitch,kellabyte/snabbswitch,lukego/snabb,snabbnfv-goodies/snabbswitch,xdel/snabbswitch,wingo/snabbswitch,lukego/snabb,justincormack/snabbswitch,alexandergall/snabbswitch,alexandergall/snabbswitch,eugeneia/snabbswitch,pirate/snabbswitch,dwdm/snabbswitch,javierguerragiraldez/snabbswitch,lukego/snabb,snabbco/snabb,hb9cwp/snabbswitch,eugeneia/snabb,lukego/snabbswitch,kellabyte/snabbswitch,Igalia/snabb,andywingo/snabbswitch,snabbco/snabb,snabbco/snabb,pirate/snabbswitch,dpino/snabbswitch,xdel/snabbswitch,hb9cwp/snabbswitch,kellabyte/snabbswitch,aperezdc/snabbswitch,mixflowtech/logsensor,snabbnfv-goodies/snabbswitch,heryii/snabb,Igalia/snabbswitch,wingo/snabb,fhanik/snabbswitch,wingo/snabbswitch,dpino/snabbswitch,Igalia/snabb,Igalia/snabb,eugeneia/snabb,alexandergall/snabbswitch,dpino/snabb,snabbco/snabb,SnabbCo/snabbswitch,lukego/snabbswitch,SnabbCo/snabbswitch,Igalia/snabb,virtualopensystems/snabbswitch,alexandergall/snabbswitch,eugeneia/snabbswitch,lukego/snabb,eugeneia/snabb,dwdm/snabbswitch,plajjan/snabbswitch,kbara/snabb,dpino/snabbswitch,Igalia/snabb,hb9cwp/snabbswitch,pavel-odintsov/snabbswitch,dpino/snabb,alexandergall/snabbswitch,eugeneia/snabb,alexandergall/snabbswitch,hb9cwp/snabbswitch,lukego/snabbswitch,aperezdc/snabbswitch,pavel-odintsov/snabbswitch,wingo/snabb,wingo/snabbswitch,alexandergall/snabbswitch,justincormack/snabbswitch,snabbco/snabb,xdel/snabbswitch,snabbnfv-goodies/snabbswitch,andywingo/snabbswitch,snabbco/snabb,plajjan/snabbswitch,Igalia/snabbswitch,heryii/snabb,snabbco/snabb,virtualopensystems/snabbswitch,Igalia/snabbswitch,virtualopensystems/snabbswitch,wingo/snabb,Igalia/snabb,andywingo/snabbswitch,Igalia/snabbswitch,andywingo/snabbswitch,kbara/snabb,SnabbCo/snabbswitch,mixflowtech/logsensor,eugeneia/snabbswitch,dpino/snabb,mixflowtech/logsensor,fhanik/snabbswitch,pirate/snabbswitch,pavel-odintsov/snabbswitch,plajjan/snabbswitch,justincormack/snabbswitch,Igalia/snabbswitch,dwdm/snabbswitch,kbara/snabb,alexandergall/snabbswitch,dpino/snabb,eugeneia/snabb,heryii/snabb,SnabbCo/snabbswitch,wingo/snabb,Igalia/snabb,wingo/snabb,eugeneia/snabbswitch,plajjan/snabbswitch,snabbnfv-goodies/snabbswitch,aperezdc/snabbswitch,snabbco/snabb,mixflowtech/logsensor,eugeneia/snabb,eugeneia/snabb,heryii/snabb,heryii/snabb,dpino/snabb,kbara/snabb,mixflowtech/logsensor,javierguerragiraldez/snabbswitch,dpino/snabb,lukego/snabbswitch,fhanik/snabbswitch,kbara/snabb,heryii/snabb,Igalia/snabb,dpino/snabb,dpino/snabbswitch,eugeneia/snabb,wingo/snabb,aperezdc/snabbswitch