lib: reject string "0" in validatePort when allowZero is false #8510

Job	Run time
Build slim tarball	1m 11s
aarch64-linux: Cache V8 build	23s
x86_64-darwin: with shared libraries / build	34m 56s
x86_64-linux: with shared libraries / build	26m 32s
aarch64-darwin: with shared libraries / build	27m 15s
aarch64-linux: with shared openssl-3.6.2 / build	26m 13s
aarch64-linux: with shared openssl-3.0.21 / build	26m 20s
aarch64-linux: with shared openssl-1.1.1w / build	25m 30s
aarch64-linux: with shared openssl-4.0.1 / build	25m 38s
aarch64-linux: with shared boringssl-0.20260526.0 / build	25m 50s
aarch64-linux: with shared openssl-3.5.7 / build	26m 45s
	4h 6m 33s

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