Allow read_link to read absolute paths #1655

Job	Run time
Check Cross-Compilation on Rust nightly (nightly)	2m 6s
Check Cross-Compilation on Rust nightly on Windows (nightly)	1m 46s
Check Cross-Compilation (stable)	1m 2s
Check Cross-Compilation on Windows (stable)	49s
Check Cross-Compilation (beta)	50s
Fuzz Targets	48s
Check Cross-Compilation on Windows (beta)	46s
Rustfmt	13s
Test linux-raw support (ubuntu)	31s
Test (msrv)	2m 5s
Test linux-raw support (ubuntu-20.04)	32s
Test (stable)	18s
Test on Musl (ubuntu)	31s
Test (windows-latest)	16s
Test (windows-2019)	17s
Test with Rust nightly (ubuntu)	31s
Test (macos-latest)	26s
Test with Rust nightly (windows)	1m 15s
Test (macos-11)	14s
Test (beta)	15s
Test (ubuntu-20.04)	23s
Test (aarch64-ubuntu)	31s
	16m 25s

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