Anchor sync-from-windows dgVoodoo2 excludes to the deploy root

The exclude patterns had no leading slash, so rsync matched them on basename at
any depth. That blocked MW4/dgvoodoo2_files/ as well -- a tracked staging copy,
committed since RC1, that pod owners install by hand on Win10/11 and which must
keep mirroring. Only a live dgVoodoo2 at the MW4/ root is dangerous, because
that is the copy the game would actually load.

Co-authored-by: Claude Opus 5 (Anthropic) <noreply@anthropic.com>
Co-authored-by: GitHub Copilot <copilot@github.com>

build-env/sync-from-windows.sh

@@ -98,20 +98,22 @@ echo "=== [4/6] Deployed game (MW4/) - output of deploy-mw4.ps1 ==="
 # Two classes of exclusion here:
 #  - per-machine and gitignored: player-made variants, and the GameOS run-time
 #    reports which are rewritten on every launch.
-#  - dgVoodoo2: an installed-per-machine, OS-dependent prerequisite for Win10/11
-#    pods. It must NEVER enter the repo -- shipping it would push a Win10-only
-#    dependency onto the XP pods and break them. Removed deliberately in
-#    0ceba9c7; do not "fix" that by letting a pull put it back.
+#  - dgVoodoo2 sitting at the deploy ROOT, where it would be live. It is an
+#    installed-per-machine, OS-dependent prerequisite for Win10/11 pods and must
+#    never ship active, because that would push a Win10-only dependency onto the
+#    XP pods and break them. Removed deliberately in 0ceba9c7.
+#    The leading slash anchors these to MW4/ itself: MW4/dgvoodoo2_files/ is a
+#    tracked staging copy for pod owners to install by hand, and must still sync.
 rsync $RSYNC_OPTS \
     --exclude='Resource/Variants/' \
     --exclude='gos-displays.txt' \
     --exclude='gos-fps.txt' \
-    --exclude='[Dd][Gg][Vv]oodoo.conf' \
-    --exclude='[Dd][Gg][Vv]oodooCpl.exe' \
-    --exclude='[Dd][Dd]raw.dll' \
-    --exclude='[Dd]3[Dd]8.dll' \
-    --exclude='[Dd]3[Dd]9.dll' \
-    --exclude='[Dd]3[Dd][Ii]mm.dll' \
+    --exclude='/[Dd][Gg][Vv]oodoo.conf' \
+    --exclude='/[Dd][Gg][Vv]oodooCpl.exe' \
+    --exclude='/[Dd][Dd]raw.dll' \
+    --exclude='/[Dd]3[Dd]8.dll' \
+    --exclude='/[Dd]3[Dd]9.dll' \
+    --exclude='/[Dd]3[Dd][Ii]mm.dll' \
     "$SRC/MW4/" "$DST/MW4/"
 
 echo
@@ -154,8 +156,8 @@ echo "         Gameleap/code source, Gameleap/mw4/Content, hsh, Assets, Stats"
 echo "         Resource/*.tga *.nfo *.txt, build-env scripts, BTFrstrm"
 echo "NOT pulled (per-machine):"
 echo "         MW4/Resource/Variants/, MW4/gos-displays.txt, MW4/gos-fps.txt"
-echo "         MW4/ dgVoodoo2 (DDraw/D3D8/D3D9/D3DImm.dll, dgVoodoo.conf/Cpl.exe)"
-echo "         -- a Win10/11-only prerequisite that must never reach the XP pods"
+echo "         MW4/ root dgVoodoo2 (DDraw/D3D8/D3D9/D3DImm.dll, dgVoodoo.conf/Cpl.exe)"
+echo "         -- Win10/11-only; MW4/dgvoodoo2_files/ staging copy DOES sync"
 
 echo
 echo "=== Changed in the working tree ==="