fix(net): Fix potential network hangs, and reduce code complexity #296

Job	Run time
Check deny.toml bans	25s
Check Cargo.lock is up to date	58s
Check deny.toml bans --features default-release-binaries	26s
Check deny.toml bans --all-features	29s
Install zebrad from lockfile without cache on ubuntu-latest	9m 1s
Test stable on ubuntu-latest	30m 41s
Test beta on ubuntu-latest	29m 48s
Check for unused dependencies	10s
Test stable on macos-latest	50m 14s
Check deny.toml sources	26s
Check deny.toml sources --features default-release-binaries	25s
Check deny.toml sources --all-features	25s
Open or update issues for OS integration failures	0s
	2h 3m 28s

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