xkb/xkbUtils.c: add link to bugreport

The problem we are fixing (or better "working around") here has also been seen in XQuartz, but no-one has found the reason yet. Point to bugreport so that anyone stumbling over this in future can check if there's a better fix and possibly implement that one.

xkb/xkbUtils.c: add link to bugreport
3053d7a8 · Ulrich Sibiller · Mike Gabriel · ad90098f · 3053d7a8
Commit 3053d7a8 authored Jan 14, 2020 by Ulrich Sibiller Committed by Mike Gabriel May 07, 2020
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xkbUtils.c nx-X11/programs/Xserver/xkb/xkbUtils.c +5 -1

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--- a/nx-X11/programs/Xserver/xkb/xkbUtils.c
+++ b/nx-X11/programs/Xserver/xkb/xkbUtils.c
@@ -676,7 +676,11 @@ unsigned	act;
 	}
 	else {
 #ifdef NXAGENT_SERVER
-	  /* we have seen division by zero here */
+	  /*
+           * we have seen division by zero here - see
+	   * https://github.com/ArcticaProject/nx-libs/issues/808 for
+	   * details and xorg upstream bug report
+           */
 	  if (ctrls->num_groups != 0)
 #endif
 	    group%= ctrls->num_groups;