Add IPV6_PKTINFO, Correct documentationn for IPV6_RECVPKTINFO #1263

Job	Run time
macos-aarch64	2m 6s
macos	4m 0s
linux_native_builds (x86_64-unknown-linux-gnu)	3m 9s
minver	11s
linux_native_builds (x86_64-unknown-linux-musl)	2m 55s
rust_stable	1m 18s
rustfmt	8s
tier3 (x86_64-unknown-dragonfly)	1m 2s
tier3 (x86_64-unknown-openbsd)	52s
tier3 (x86_64-unknown-haiku)	54s
cross_compiling (aarch64-linux-android)	33s
redox	37s
cross (arm-unknown-linux-gnueabi)	1m 41s
cross_compiling (arm-linux-androideabi)	35s
cross (armv7-unknown-linux-gnueabihf)	2m 0s
cross_compiling (armv7-linux-androideabi)	34s
cross (i686-unknown-linux-gnu)	1m 45s
cross_compiling (i686-linux-android)	36s
cross (i686-unknown-linux-musl)	1m 43s
cross_compiling (x86_64-linux-android)	32s
cross (mips-unknown-linux-gnu)	1m 37s
cross_compiling (arm-unknown-linux-musleabi)	37s
cross (mips64-unknown-linux-gnuabi64)	1m 39s
cross_compiling (x86_64-unknown-fuchsia)	26s
cross (mips64el-unknown-linux-gnuabi64)	1m 36s
cross_compiling (x86_64-unknown-illumos)	25s
cross (mipsel-unknown-linux-gnu)	1m 43s
cross_compiling (aarch64-apple-ios, true)	30s
cross (powerpc64le-unknown-linux-gnu)	1m 45s
cross_compiling (powerpc64-unknown-linux-gnu)	38s
cross_compiling (s390x-unknown-linux-gnu)	39s
cross_compiling (x86_64-unknown-linux-gnux32)	37s
cross_compiling (x86_64-unknown-netbsd)	27s
	39m 50s

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