Documentation: net: Convert external kernel networking docs

Convert cross-references to kernel networking docs that use external
links into internal ones.

Signed-off-by: Bagas Sanjaya <[email protected]>
Reviewed-by: Arthur Kiyanovski <[email protected]>

Author: bagasme

Documentation/networking/device_drivers/can/ctu/ctucanfd-driver.rst

@@ -40,8 +40,7 @@ About SocketCAN
 SocketCAN is a standard common interface for CAN devices in the Linux
 kernel. As the name suggests, the bus is accessed via sockets, similarly
 to common network devices. The reasoning behind this is in depth
-described in `Linux SocketCAN <https://www.kernel.org/doc/html/latest/networking/can.html>`_.
-In short, it offers a
+described in Documentation/networking/can.rst. In short, it offers a
 natural way to implement and work with higher layer protocols over CAN,
 in the same way as, e.g., UDP/IP over Ethernet.
 

Documentation/networking/device_drivers/ethernet/amazon/ena.rst

@@ -366,9 +366,9 @@ RSS
 
 DEVLINK SUPPORT
 ===============
-.. _`devlink`: https://www.kernel.org/doc/html/latest/networking/devlink/index.html
 
-`devlink`_ supports reloading the driver and initiating re-negotiation with the ENA device
+:doc:`devlink </networking/devlink/index>` supports reloading the driver and
+initiating re-negotiation with the ENA device
 
 .. code-block:: shell
 

Documentation/networking/ethtool-netlink.rst

@@ -1100,8 +1100,7 @@ This feature is mainly of interest for specific USB devices which does not cope
 well with frequent small-sized URBs transmissions.
 
 ``ETHTOOL_A_COALESCE_RX_PROFILE`` and ``ETHTOOL_A_COALESCE_TX_PROFILE`` refer
-to DIM parameters, see `Generic Network Dynamic Interrupt Moderation (Net DIM)
-<https://www.kernel.org/doc/Documentation/networking/net_dim.rst>`_.
+to DIM parameters, see Documentation/networking/net_dim.rst.
 
 COALESCE_SET
 ============

Documentation/networking/snmp_counter.rst

@@ -782,13 +782,11 @@ TCP ACK skip
 ============
 In some scenarios, kernel would avoid sending duplicate ACKs too
 frequently. Please find more details in the tcp_invalid_ratelimit
-section of the `sysctl document`_. When kernel decides to skip an ACK
-due to tcp_invalid_ratelimit, kernel would update one of below
-counters to indicate the ACK is skipped in which scenario. The ACK
-would only be skipped if the received packet is either a SYN packet or
-it has no data.
-
-.. _sysctl document: https://www.kernel.org/doc/Documentation/networking/ip-sysctl.rst
+section of the Documentation/networking/ip-sysctl.rst. When kernel
+decides to skip an ACK due to tcp_invalid_ratelimit, kernel would
+update one of below counters to indicate the ACK is skipped in
+which scenario. The ACK would only be skipped if the received
+packet is either a SYN packet or it has no data.
 
 * TcpExtTCPACKSkippedSynRecv