core.worker: Updated API & removed dead code
core.worker: Updated API & removed dead code

Updated the comment describing the API. (Should be replaced by
documentation in src/README.md.)

Removed config.configure(name, c) which is a remnant of the past design
when we supposed that app network configurations would be lingua franca
for parents to configure their children. That is now out of scope.

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