Until now, if the secure channel connected to a controller, then it would
not back off at all from re-connecting. Therefore, if something causes
the secure channel to disconnect quickly after connecting to a controller,
then we could get storms of attempted connections.
This commit causes the secure channel to back off exponentially from
connection attempts regardless of the reason for disconnection, preventing
such storms.
Otherwise, if a multi-word $(CC) is provided by the user, such as
"gcc -m32", then we test each word as a compiler. "-m32" then gives
you an error from the shell about "-3" not being a valid option.
Justin Pettit
Ben Pfaff
Martin Casado
root