Copyright for socket.7:

This man page is Copyright (C) 1999 Andi Kleen <ak@muc.de>.
and copyright (c) 1999 Matthew Wilcox.

License for socket.7:

Permission is granted to distribute possibly modified copies
of this page provided the header is included verbatim,
and in case of nontrivial modification author and date
of the modification is added to the header.