Squashed commit of the following:

commit 04b8e20773
Author: Asbelos <asbelos@btinternet.com>
Date:   Sat Jan 18 10:13:32 2025 +0000

    Fix websocket binary mask issue

    Includes <D WEBSOCKET ON>

commit 5600382ae4
Merge: 5941866 137008c
Author: Asbelos <asbelos@btinternet.com>
Date:   Sat Jan 18 08:58:30 2025 +0000

    Merge branch 'devel' into devel-websockets

commit 59418668e2
Author: Asbelos <asbelos@btinternet.com>
Date:   Fri Jan 17 13:16:29 2025 +0000

    WIfiESP websock fix

commit c4e2146bd1
Author: Asbelos <asbelos@btinternet.com>
Date:   Thu Jan 16 08:37:38 2025 +0000

    websockets broadcast

commit 2591d100ca
Author: Asbelos <asbelos@btinternet.com>
Date:   Wed Jan 15 19:38:41 2025 +0000

    browser barf on \n

commit 67f836e886
Author: Asbelos <asbelos@btinternet.com>
Date:   Wed Jan 15 09:44:04 2025 +0000

    5.5.5 + websockets

    Ethernet not yet included

DCCEXParser.cpp

@@ -1255,6 +1255,10 @@ bool DCCEXParser::parseD(Print *stream, int16_t params, int16_t p[])
     case "LCN"_hk: // <D LCN ON/OFF>
         Diag::LCN = onOff;
         return true;
+
+    case "WEBSOCKET"_hk: // <D WEBSOCKET ON/OFF>
+        Diag::WEBSOCKET = onOff;
+        return true;
 #endif
 #ifndef DISABLE_EEPROM
     case "EEPROM"_hk: // <D EEPROM NumEntries>