Update protocols documentation (#2081)

doc/protocols.rst

@@ -7,8 +7,8 @@ Work in progress!
 
 .. _Proto 338:
 
-`NDPI_PROTOCOL_SRTP`: SRTP (Secure Real-time Transport Protocol)
-================================================================
+`NDPI_PROTOCOL_SRTP`
+====================
 The Secure Real-time Transport Protocol (SRTP) is a profile for Real-time Transport Protocol (RTP) intended to provide encryption, message authentication, integrity, and replay attack protection to the RTP data.
 
 References: `RFC3711 <https://datatracker.ietf.org/doc/html/rfc3711>`_.
@@ -19,13 +19,22 @@ Notes:
 - It is not usually possible to tell RTP from SRTP. nDPI generally uses the former and it uses the latter only when it is really sure that the media stream has been encrypted.
 
 
+.. _Proto 339:
+
+`NDPI_PROTOCOL_OPERA_VPN`
+=========================
+Opera VPN is a free VPN included with Opera Browser.
+
+References: `Main site <https://www.opera.com/it/features/free-vpn>`_.
+
+
 .. _Proto 340:
 
 `NDPI_PROTOCOL_EPICGAMES`
 =========================
 Epic Games is a video game company developing the Unreal Engine and some successful games as Fortnite and Gears of War.
 
-References: `Main site <https://store.epicgames.com/en-US/>`_ `Fortnite <https://www.fortnite.com/>`_.
+References: `Main site <https://store.epicgames.com/en-US/>`_ and `Fortnite <https://www.fortnite.com/>`_.
 
 
 .. _Proto 341:
@@ -67,7 +76,7 @@ Notes:
 =========================
 Proton VPN is a VPN service operated by the Swiss company Proton AG, the company behind the email service Proton Mail
 
-References: `Main site https://protonvpn.com/`
+References: `Main site <https://protonvpn.com/>`_.
 
 
 .. _Proto 345:
@@ -76,7 +85,7 @@ References: `Main site https://protonvpn.com/`
 ======================
 Apache Thrift is a generic data interchange framework that supports a bunch of different languages and platforms.
 
-References: `Official site <https://thrift.apache.org>`_ `Github <https://github.com/apache/thrift>`_.
+References: `Official site <https://thrift.apache.org>`_ and `Github <https://github.com/apache/thrift>`_.
 
 
 .. _Proto 346:
@@ -98,7 +107,7 @@ Notes:
 ================================
 The Service Location Protocol is a service discovery protocol that allows computers and other devices to find services in a local area network without prior configuration.
 
-References: `SLPv1 <https://datatracker.ietf.org/doc/html/rfc2165>`_ `SLPv2 <https://datatracker.ietf.org/doc/html/rfc2608>`_.
+References: `SLPv1 <https://datatracker.ietf.org/doc/html/rfc2165>`_ and `SLPv2 <https://datatracker.ietf.org/doc/html/rfc2608>`_.
 
 
 .. _Proto 348:
@@ -107,6 +116,6 @@ References: `SLPv1 <https://datatracker.ietf.org/doc/html/rfc2165>`_ `SLPv2 <htt
 ========================
 Mullvad is a VPN service operated by Mullvad VPN AB, based in Sweden
 
-References: `Main site https://mullvad.net/`
+References: `Main site <https://mullvad.net/>`_.