Per libvncserver developer bk138 do not automatically release onHold

diff --git a/libvncserver/main.c b/libvncserver/main.c
index cb66976..7340364 100644
--- a/libvncserver/main.c
+++ b/libvncserver/main.c
@@ -469,7 +469,6 @@
     rfbClientPtr cl = (rfbClientPtr)data;
     rfbBool haveUpdate;
     sraRegion* updateRegion;
-    cl->onHold = FALSE;
 
     while (1) {
         haveUpdate = false;