docs: networking: convert 6lowpan.txt to ReST

- add SPDX header;
- use document title markup;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-02-06 16:17:22 +01:00 • committed by Marcel Holtmann
commit 107db7ec78
3 changed files with 54 additions and 50 deletions