docs: networking: Convert bridge.txt to rst

The kernel documentation is now restructured text. Convert the Ethernet
Bridge documentation and include it in the toplevel kernel
documentation.

 - Fix heading adornments.
 - Add license identifier.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobin C. Harding 2018-07-18 13:27:36 +10:00 • committed by David S. Miller
commit 6b335f8205
3 changed files with 22 additions and 15 deletions