test

Discovery: Refactor and add Avahi DBus backend #2004

Job	Run time
cargo fmt	10s
cargo +stable clippy (ubuntu-latest)	2m 27s
cargo +1.75 check (windows-latest)	9m 48s
cargo +1.75 check (ubuntu-latest)	3m 44s
cargo +stable check (windows-latest)	5m 8s
cross +1.75 build armv7-unknown-linux-gnueabihf	2m 40s
cargo +stable check (ubuntu-latest)	4m 35s
cross +stable build armv7-unknown-linux-gnueabihf	43s
cargo +beta check (ubuntu-latest)	2m 44s
cross +1.75 build aarch64-unknown-linux-gnu	2m 55s
cross +stable build aarch64-unknown-linux-gnu	51s
cross +1.75 build riscv64gc-unknown-linux-gnu	2m 54s
cross +stable build riscv64gc-unknown-linux-gnu	51s
	39m 30s

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