docbook: make a networking book and fix a few errors

Move networking (core and drivers) docbook to its own networking book.
Fix a few kernel-doc errors in header and source files.

Signed-off-by: Randy Dunlap <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: "J. Bruce Fields" <[email protected]>
Cc: Neil Brown <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
6 files changed