Auto MAC setup sets each host MAC equal to its DPID, which simplifies
debugging.
Auto ARP setup removes the need for broadcast support for ARP, which
enables a smaller NOX controller.
If ripcord.dctopo imports properly, then include its topologies in the
list of available ones. Also replace topo.py with new generic
topologies and update paths.
Also remove all non-object-oriented legacy Mininet code and update
tests.
User-space compatibility is untested, but most of the code for it is
still in.
Nodes include Switch, Host, and Controller; move these to a separate
file.
This file still could use some attention to hide private functions.
Node seems like a primary class to extend, for adding stuff like Open
vSwitch, so it could benefit from a simpler interface.
Having a file with the same name as its package creates hard-to-diagnose
import error, so rename mininet.py to net.py. This commit moves utility
functions, generally those dealing with network namespaces and interface
management, into their own file.
Also fix a few minor formatting bugs and clean up logging code (which
had issues when multiple files would import mininet.logging_mod).
Brandon Heller