[Bugfix] Start per session D-Bus daemon correctly.

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=497592


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3814 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/unix/vncserver b/unix/vncserver
index f22d63b..90ef0d2 100755
--- a/unix/vncserver
+++ b/unix/vncserver
@@ -57,6 +57,7 @@
     = ("#!/bin/sh\n\n".
        "vncconfig -iconic &\n".
        "unset SESSION_MANAGER\n".
+       "unset DBUS_SESSION_BUS_ADDRESS\n".
        "OS=`uname -s`\n".
        "if [ \$OS = 'Linux' ]; then\n".
        "  case \"\$WINDOWMANAGER\" in\n".