stream: align Readable.toWeb termination with eos #4556

Job	Run time
Build slim tarball	1m 58s
x86_64-linux: with shared libraries	21m 43s
x86_64-darwin: with shared libraries	42m 6s
aarch64-linux: with shared libraries	19m 5s
aarch64-darwin: with shared libraries	17m 40s
	1h 42m 32s

Provide feedback