Drop password auth from vnc server

Currently we're held back by an `asyncvnc` issue,
https://github.com/barneygale/asyncvnc/issues/1 but even still, given
we're running the container to be only accessible by localhost i'm not
sure we need this for the moment (or at all) anyway.

dockering/ib/docker-compose.yml

@@ -29,6 +29,12 @@ services:
         source: ./fork_ports_delayed.sh
         target: /root/scripts/fork_ports_delayed.sh
 
+      # force our noop script - socat isn't needed in host mode.
+      - type: bind
+        source: ./run_x11_vnc.sh
+        target: /root/scripts/run_x11_vnc.sh
+        read_only: true
+
     # NOTE:to fill these out, define an `.env` file in the same dir as
     # this compose file which looks something like:
     # TWS_USERID='myuser'

dockering/ib/run_x11_vnc.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+x11vnc \
+    -ncache_cr \
+    -display :1 \
+    -forever \
+    -shared \
+    -logappend /var/log/x11vnc.log \
+    -bg \
+    -noipv6 \
+    # can't use this because of ``asyncvnc`` issue:
+    # https://github.com/barneygale/asyncvnc/issues/1
+    # -passwd "$VNC_SERVER_PASSWORD"