* Hacky tmcd redirection. If the reserved table slot tmcd_redirect is
  set, return redirect spec that tells the client tmcc to drop the
  connection and retry the server at the new location, using the vnode
  id that is part of the redirection string. Note that tmcd_redirect
  is set on the remote emulab by the Geni startsliver code.

* Neuter the privkey stuff that we require of remote nodes. In fact,
  its already only required for RON nodes, and rather then yet another
  exception, just kill it. It offers us nothing.

* Neuter the ssl client verification. This is where we verify the
  client certificate has a CN field with the type of the node equal to
  type the DB says it is. This is also a pointless check since is
  offers us nothing additional; the client certificate already had to
  be signed by us. Tired of adding special cases to the code for each
  new node type.

* Temporary neutering of the requirement that all remote nodes use ssl
  to talk to tmcd. The problem here is that remote nodes on other
  testbeds will not have the proper certificate on their images, and
  so they will not be able to talk to our tmcd. Since we do not return
  anything sensitive via tmcd, I have relaxed this requirement for
  now, and changed the check so that functions with newly added flag
  F_REMREQSSL will not be allowed unless it is ssl. For the protogeni
  code this will do since I only need a few things.

* For tmcd on the remote testbeds, there is new code in doaccounts
  that will return accounts and ssh keys from the nonlocal users
  table.  This table is set up by the Geni libraries during sliver
  creation (from the registry entry for the slice).