docs: networking: convert x25-iface.txt to ReST

Not much to be done here:

- add SPDX header;
- adjust title markup;
- remove a tail whitespace;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mauro Carvalho Chehab 2020-05-01 16:44:27 +02:00 • committed by David S. Miller
commit 883780af72
5 changed files with 132 additions and 125 deletions