apps.rate_limiter: add statistics counters.
apps.rate_limiter: add statistics counters.

dpino/snabbswitch,eugeneia/snabb,kbara/snabb,eugeneia/snabbswitch,Igalia/snabbswitch,alexandergall/snabbswitch,alexandergall/snabbswitch,eugeneia/snabb,dpino/snabbswitch,snabbco/snabb,mixflowtech/logsensor,snabbco/snabb,dpino/snabb,Igalia/snabb,eugeneia/snabbswitch,SnabbCo/snabbswitch,dpino/snabb,snabbco/snabb,Igalia/snabbswitch,kbara/snabb,Igalia/snabbswitch,eugeneia/snabbswitch,heryii/snabb,heryii/snabb,wingo/snabb,alexandergall/snabbswitch,wingo/snabbswitch,dpino/snabb,wingo/snabbswitch,Igalia/snabb,heryii/snabb,heryii/snabb,kbara/snabb,kbara/snabb,eugeneia/snabb,eugeneia/snabbswitch,SnabbCo/snabbswitch,wingo/snabbswitch,eugeneia/snabb,mixflowtech/logsensor,Igalia/snabb,Igalia/snabb,dpino/snabb,mixflowtech/logsensor,Igalia/snabb,Igalia/snabbswitch,alexandergall/snabbswitch,Igalia/snabb,mixflowtech/logsensor,eugeneia/snabb,dpino/snabb,dpino/snabb,alexandergall/snabbswitch,eugeneia/snabb,wingo/snabbswitch,dpino/snabb,wingo/snabb,wingo/snabb,alexandergall/snabbswitch,alexandergall/snabbswitch,eugeneia/snabb,eugeneia/snabb,heryii/snabb,alexandergall/snabbswitch,heryii/snabb,Igalia/snabb,dpino/snabbswitch,SnabbCo/snabbswitch,SnabbCo/snabbswitch,snabbco/snabb,wingo/snabb,snabbco/snabb,Igalia/snabb,kbara/snabb,Igalia/snabbswitch,snabbco/snabb,dpino/snabbswitch,kbara/snabb,mixflowtech/logsensor,snabbco/snabb,wingo/snabb,snabbco/snabb,wingo/snabb