Change `port` from uint16_t to uint32_t, to support VSOCK #3129

Job	Run time
clang-sanitizers (,thread)	17m 55s
byo-crypto	2m 27s
downstream	16m 12s
clang-sanitizers (,address,undefined)	16m 13s
linux-compat (manylinux1-x64)	15m 24s
linux-compat (manylinux1-x86)	16m 27s
linux-compiler-compat (clang-3)	16m 3s
linux-compat (manylinux2014-x64)	16m 3s
linux-shared-libs	15m 47s
linux-debug	16m 10s
linux-compiler-compat (clang-6)	15m 48s
linux-compat (manylinux2014-x86)	15m 0s
linux-compiler-compat (clang-8)	17m 36s
linux-compat (al2-x64)	15m 32s
linux-compiler-compat (clang-9)	17m 21s
linux-compiler-compat (clang-10)	17m 20s
osx	19m 23s
windows	16m 59s
linux-compiler-compat (clang-11)	17m 27s
windows-app-verifier	26m 29s
linux-compiler-compat (gcc-4.8)	15m 40s
linux-compiler-compat (gcc-5)	15m 25s
windows-shared-libs	17m 1s
windows-vc14 (x86)	14m 22s
windows-vc14 (x64)	16m 10s
linux-compiler-compat (gcc-6)	17m 0s
linux-compiler-compat (gcc-7)	16m 11s
linux-compiler-compat (gcc-8)	16m 27s
	7h 35m 52s

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