Fix handling of `..` paths in symlinks. #1694

Job	Run time
Check Cross-Compilation on Rust nightly (nightly)	1m 55s
Check Cross-Compilation (stable)	1m 13s
Check Cross-Compilation on Rust nightly on Windows (nightly)	1m 59s
Check Cross-Compilation on Windows (stable)	3m 19s
Check Cross-Compilation (beta)	1m 40s
Check Cross-Compilation on Windows (beta)	1m 40s
Fuzz Targets	44s
Rustfmt	3s
Test linux-raw support (ubuntu)	29s
Test (stable)	24s
Test linux-raw support (ubuntu-20.04)	32s
Test on Musl (ubuntu)	1m 5s
Test (msrv)	1m 13s
Test (windows-latest)	1m 37s
Test (windows-2019)	2m 30s
Test with Rust nightly (ubuntu)	31s
Test (macos-latest)	36s
Test with Rust nightly (windows)	1m 42s
Test (macos-11)	1s
Test (beta)	32s
Test (ubuntu-20.04)	25s
Test (aarch64-ubuntu)	2m 18s
	26m 28s

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