FIX: run_once_ip6_renewal
Created by: fpokryvk
FIX '* Force renew IPv6 for "testG"' step:
- captured ipv6 included newline causing problems
- use "ip flush" to remove old address (no need to check that address is deleted afterwards)
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Created by: fpokryvk
FIX '* Force renew IPv6 for "testG"' step: