Supervisor process restores blocking flags on stdin,stdout,stderr
Supervisor process restores blocking flags on stdin,stdout,stderr

"fork" shares file descriptions between children and parents, so if
Snabb sets these fds as nonblocking, the parent will inherit that as
well.  Therefore restore in the supervisor.

Igalia/snabb,Igalia/snabb,snabbco/snabb,snabbco/snabb,alexandergall/snabbswitch,snabbco/snabb,snabbco/snabb,Igalia/snabb,SnabbCo/snabbswitch,SnabbCo/snabbswitch,eugeneia/snabb,snabbco/snabb,Igalia/snabb,eugeneia/snabb,eugeneia/snabb,Igalia/snabbswitch,eugeneia/snabb,eugeneia/snabb,Igalia/snabb,Igalia/snabb,Igalia/snabb,alexandergall/snabbswitch,SnabbCo/snabbswitch,alexandergall/snabbswitch,Igalia/snabbswitch,eugeneia/snabb,snabbco/snabb,Igalia/snabbswitch,alexandergall/snabbswitch,eugeneia/snabb,snabbco/snabb,Igalia/snabbswitch,SnabbCo/snabbswitch,snabbco/snabb,alexandergall/snabbswitch,alexandergall/snabbswitch,alexandergall/snabbswitch,Igalia/snabb,Igalia/snabbswitch,alexandergall/snabbswitch,eugeneia/snabb