Prevent directory traversal in server-supplied filenames #2440

Job	Run time
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --features=native-tls)	3m 0s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --features=native-tls)	55s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features --features=native-tls,online...	48s
Test (x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features --features=native-tls,online...	48s
Rustfmt and clippy	1m 12s
Rustfmt and clippy	1m 12s
Test (x86_64-apple-darwin, macos-13, --features=native-tls)	1m 31s
Test (x86_64-apple-darwin, macos-13, --features=native-tls)	1m 31s
Test (aarch64-apple-darwin, macos-14, --features=native-tls)	55s
Test (aarch64-apple-darwin, macos-14, --features=native-tls)	55s
Test (x86_64-pc-windows-msvc, windows-latest, --features=native-tls)	1m 37s
Test (x86_64-pc-windows-msvc, windows-latest, --features=native-tls)	1m 37s
Test (x86_64-unknown-linux-musl, ubuntu-latest, true)	1m 9s
Test (x86_64-unknown-linux-musl, ubuntu-latest, true)	1m 9s
Test (aarch64-unknown-linux-musl, ubuntu-latest, true, -- --test-threads=4)	1m 41s
Test (aarch64-unknown-linux-musl, ubuntu-latest, true, -- --test-threads=4)	1m 41s
Test (arm-unknown-linux-gnueabihf, ubuntu-latest, true, -- --test-threads=4)	1m 36s
Test (arm-unknown-linux-gnueabihf, ubuntu-latest, true, -- --test-threads=4)	1m 36s
	24m 53s

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