install.sh: Do not use `tac` to buffer server response #2028

Job	Run time
Rustfmt and clippy	42s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --features=native-tls)	1m 3s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features --features=native-tls,online...	1m 15s
Test (x86_64-apple-darwin, macos-latest, --features=native-tls)	2m 8s
Test (x86_64-pc-windows-msvc, windows-latest, --features=native-tls)	3m 8s
Test (x86_64-unknown-linux-musl, ubuntu-latest, true)	1m 45s
Test (aarch64-unknown-linux-musl, ubuntu-latest, true, -- --test-threads=4)	3m 10s
Test (arm-unknown-linux-gnueabihf, ubuntu-latest, true, -- --test-threads=4)	1m 52s
	15m 3s

Provide feedback