stream: improve Web Compression spec compliance #3950

Job	Run time
Build slim tarball	1m 59s
aarch64-darwin: with shared libraries	22m 9s
x86_64-darwin: with shared libraries	30m 3s
aarch64-linux: with shared libraries	19m 27s
x86_64-linux: with shared libraries	24m 25s
	1h 38m 3s

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