vservers can be configured with experimental interfaces.  Think duct tape
and baling wire here...

 * commmon/bootvnodes: did some code refactoring in anticipation of
   something that was never needed.  Oh well, it looks purdy anyway!

 * common/libsetup.pm: LINUXJAILED() predicate to indentify local Linux
   vserver setups.  getlocalevserver() to return the IP/hostname of the
   "local" event server.

 * common/rc.{linktest,linkagent,progagent,trace,trafgen}: use the
   getlocalevserver() function for use with -s options (Linux vserver
   based vnodes cannot bind to localhost to talk to the pnode pubsubd)

 * common/config/rc.ifconfig: run this for Linux vservers, put out iface
   map for veths as well as physical interfaces

 * common/delaysetup: add -j vnodeid option, will need this at some point

 * linux/liblocsetup.pm: veth (actually etun) setup for Linux vserver vnodes

 * linux/mkvserver.pl: first cut at getting interfaces configured in
   vservers, do all the necessary etun/br plumbing (NOT a pretty sight...)

 * linux/vserver/rc.invserver (moved here from linux/rc.invserver):
   run linktest in local vservers (though it won't run yet due to NFS
   problems in vservers)

 * linux/vserver/vserver-cnet.sh: statically configure the control net
   in a vserver, no DHCP here!

 * linux/vserver/vserver-{init,rc}.sh: two parts of the Funky Interface
   Setup Dance that run inside the vserver