add l2_multi_syn_mem_corruption
Revert "Revert "software_switch: implement port_down by OFPPS_LINK_DOWN, not port delete""

This reverts commit ada6cb9e298db776dd8f8b37ed39219063b3eeb9.

Meta-revert, yay!
Merge branch 'debugger' of github.com:ucb-sts/pox into debugger
Merge branch 'debugger' of github.com:ucb-sts/pox into debugger
Merge branch 'debugger' of github.com:ucb-sts/pox into debugger
software_switch: avoid sending messages before handshake complete

STS causes events to happen before the switch has completed the
handshake. This makes sure that the first two messages required
by the OF standards are completed before other messages are
relayed to the controller.
add l2_multi_debug_pox

This is a version of l2_multi that terminates on the KeyError
for help with debugging
Merge pull request #1 from andiwundsam/debugger

Improvements to SoftwareSwitch, syn_mem_test