Re: [PATCH net 3/3] selftests: net: hsr: add shared-mutation regression test

The test covers both classes: the PRP LAN-ID race under a netem delay on
one slave, and the HSR RedBox source-MAC alias with a tagged multicast on
a slave. The capability probes (tc, python3, sch_netem, HSR/PRP support)
exit ksft_skip and propagate that status, while real failures exit 1. The
capture filters keying on destination, post-strip EtherType and payload
while leaving the asserted source MAC unfiltered look correct.

Reviewed-by: Ali Ahmet Memis <[email protected]>