docs: networking: convert dctcp.txt to ReST

- add SPDX header;
- adjust 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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index 3894043332de..9e83d3bda4e0 100644
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -49,6 +49,7 @@ Contents:
    cops
    cxacru
    dccp
+   dctcp
 
 .. only::  subproject and html