feat(tun): route all on linux #2269

Job	Run time
x86_64-unknown-linux-gnu	2m 28s
i686-unknown-linux-gnu	2m 32s
x86_64-unknown-linux-gnu-static-crt	2m 27s
x86_64-unknown-linux-musl	2m 27s
i686-unknown-linux-gnu-static-crt	2m 28s
aarch64-unknown-linux-gnu	2m 28s
armv7-unknown-linux-gnueabi	2m 27s
armv7-unknown-linux-gnueabihf	2m 28s
aarch64-unknown-linux-gnu-static-crt	2m 29s
aarch64-unknown-linux-musl	2m 30s
armv7-unknown-linux-gnueabi-static-crt	2m 28s
armv7-unknown-linux-musleabihf	2m 28s
x86_64-pc-windows-msvc	2m 25s
i686-pc-windows-msvc	2m 26s
x86_64-pc-windows-msvc-static-crt	2m 24s
i686-pc-windows-msvc-static-crt	2m 24s
x86_64-apple-darwin	2m 31s
aarch64-apple-darwin	2m 29s
x86_64-apple-darwin-static-crt	2m 31s
aarch64-apple-darwin-static-crt	2m 30s
Release	1s
Docker Image	1s
	49m 22s

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