Add IPV6_PKTINFO, Correct documentationn for IPV6_RECVPKTINFO

[ishanjain28]

IPV6_PKTINFO was missing from sockopt so I added it and the documentation for IPV6_RECVPKTINFO incorrectly said it was enabling the flag for IPV6_PKTINFO so I corrected that.

[SteveLauC]

Thanks for your interest in contributing to Nix, please rebase your branch so that the CI can work (We have migrated from Cirrus to GitHub Action)

[evanrittenhouse]

Hi, I need to be able to set this sockopt as well - should I make a new PR? This one seems a bit stale cc @SteveLauC

[SteveLauC]

Hi, I need to be able to set this sockopt as well - should I make a new PR? This one seems a bit stale cc @SteveLauC

Hi, thanks for your interest in filing a PR for this! Please go ahead:)

[ishanjain28]

hey @evanrittenhouse, Can I revive this PR instead? will rebase it today

[ishanjain28]

I must be missing some thing. I can not find IPV6_RECVPKTINFO in bsd man pages. Is it still present there and I am looking at the wrong place or do I update the tests ?

[SteveLauC]

BTW, a changelog is needed, please see CONTRIBUTING.md on how to add one.

If you apply the changes requested by me, then it should be something similar to:

filename: 2113.added.md

Add socket option `IPV6_PKTINFO` for BSDs/Linux/Android, also `IPV6_RECVPKTINFO` for DragonFlyBSD

[SteveLauC]

Thanks! :)