apps.ipv6.reassemble: avoid spurious sort
apps.ipv6.reassemble: avoid spurious sort

Respect the precondition for sort_array().

Use bit.band instead of modulo operator to check for multple of 8 of
the fragment size.

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