doc: websocket: update docs to describe additional callback parameter

Update HTTP server documentation and migration guide to account for
added request_ctx parameter to the http_resource_websocket_cb_t
callback.

Signed-off-by: Matt Rodgers <mrodgers@witekio.com>

doc/connectivity/networking/api/http_server.rst

@@ -342,7 +342,7 @@ release it when done.
     static int ws_socket;
     static uint8_t ws_recv_buffer[1024];
 
-    int ws_setup(int sock, void *user_data)
+    int ws_setup(int sock, struct http_request_ctx *request_ctx, void *user_data)
     {
         ws_socket = sock;
         return 0;

doc/releases/migration-guide-4.1.rst

@@ -367,6 +367,11 @@ Networking
   rather than directly in the :c:struct:`http_client_ctx` to correctly handle concurrent requests
   on different HTTP/2 streams.
 
+* The HTTP server public API function signature for the :c:type:`http_resource_websocket_cb_t` has
+  changed, a :c:struct:`http_request_ctx` parameter has been added. The application may use this to
+  access the request headers of the HTTP upgrade request, which may be useful in deciding whether
+  to accept or reject a websocket connection.
+
 * The :kconfig:option:`CONFIG_NET_L2_OPENTHREAD` symbol no longer implies the
   :kconfig:option:`CONFIG_NVS` Kconfig option. Platforms using OpenThread must explicitly enable
   either the :kconfig:option:`CONFIG_NVS` or :kconfig:option:`CONFIG_ZMS` Kconfig option.