Miscellaneous fixes for DHCP server, bridge ports, and CI #407

Job	Run time
check-trigger	4s
build-aarch64 / Build infix aarch64_minimal	18m 25s
build-x86_64 / Build infix x86_64_minimal	17m 48s
test-run-x86_64 / Regression Test infix x86_64_minimal	28m 34s
test-publish-x86_64	0s
	1h 4m 51s

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