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 <randy.dunlap@oracle.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/core/dev.c b/net/core/dev.c
index b2f6cb5..b3e19ae 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3038,8 +3038,7 @@
 EXPORT_SYMBOL(dev_unicast_sync);
 
 /**
- *	dev_unicast_unsync - Remove synchronized addresses from the destination
- *			     device
+ *	dev_unicast_unsync - Remove synchronized addresses from the destination device
  *	@to: destination device
  *	@from: source device
  *