https://github.com/TigerVNC/tigervnc/commit/736b50d04e1ba965696cd15d456dc2b7fc123150.patch
https://github.com/TigerVNC/tigervnc/commit/f2577107f7f55382c524d8c738a777e5cdd80f60.patch

From: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Date: Wed, 24 Nov 2021 21:09:36 +0100
Subject: [PATCH] xorg-version.h: Increase supported Xorg version to 1.21

--- a/unix/xserver/hw/vnc/xorg-version.h
+++ b/unix/xserver/hw/vnc/xorg-version.h
@@ -33,8 +33,8 @@
 #error "X.Org older than 1.16 is not supported"
 #endif
 
-#if XORG_AT_LEAST(1, 21, 0)
-#error "X.Org newer than 1.20 is not supported"
+#if XORG_AT_LEAST(1, 22, 0)
+#error "X.Org newer than 1.21 is not supported"
 #endif
 
 #endif

From: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Date: Wed, 24 Nov 2021 21:10:56 +0100
Subject: [PATCH] xvnc: adapt for 1.21

VENDOR_STRING is gone as is DEFAULT_LOG_VERBOSITY
site.h has been removed and is not needed.
--- a/unix/xserver/hw/vnc/xvnc.c
+++ b/unix/xserver/hw/vnc/xvnc.c
@@ -69,7 +69,6 @@ extern char buildtime[];
 #undef VENDOR_RELEASE
 #undef VENDOR_STRING
 #include "version-config.h"
-#include "site.h"
 
 #define XVNCVERSION "TigerVNC 1.12.80"
 #define XVNCCOPYRIGHT ("Copyright (C) 1999-2021 TigerVNC Team and many others (see README.rst)\n" \
@@ -111,14 +110,13 @@ static Bool Render = TRUE;
 static Bool displaySpecified = FALSE;
 static char displayNumStr[16];
 
-static int vncVerbose = DEFAULT_LOG_VERBOSITY;
+static int vncVerbose = 0;
 
 static void
 vncPrintBanner(void)
 {
     ErrorF("\nXvnc %s - built %s\n%s", XVNCVERSION, buildtime, XVNCCOPYRIGHT);
-    ErrorF("Underlying X server release %d, %s\n\n", VENDOR_RELEASE,
-           VENDOR_STRING);
+    ErrorF("Underlying X server release %d\n\n", VENDOR_RELEASE);
 }
 
 static void