OSV-2022-709 Heap-buffer-overflow in dissect_softether_host_fqdn

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=50105 Crash type: Heap-buffer-overflow READ 10 Crash state: dissectsoftetherhostfqdn ndpisearchsoftether checkndpidetectionfunc...