misc/enhanced_tightvnc_viewer: update ssvnc.

   -grablocal n experiment (not compiled by default).  -macuskbd
   option for macosx for orig uskdb code. keycode=N remote contol
   cmd.  Find dpy look at non-NFS cookies in /tmp.  Fix gui tray
   insertion on recent gnome dt. Fix connect_file bug. Sync SSVNC

and other proxy improvements.

ssvnc sync: connect_br.tcl socks4/5 http proxies, ss_vncviewer socks5 proxy. ssh 1st proxy. whatismyip.com fix. 127.0.0.1 on Darwin

          Improvements to ss_vncviewer.  Automatically find X dpy and
          X login.  Reorganize menus a bit.  ~/.ssvncrc file.