Incomplete list of possible error codes in getsockopt.2

[Brennan Vincent <brennan@xxxxxxxxxxxxxx>]

Hello,

ENOENT is not documented in the ERRORS section of getsockopt.2.

But ENOENT can be returned for the option SO_ORIGINAL_DST, as can
be seen here: https://github.com/torvalds/linux/blob/b00ed48bb0a7/net/netfilter/nf_conntrack_proto.c#L305-L305

Thanks,