Restore ability to manage boxes with older versions of the sudo package

This reverts the change introduced in 9cd9e6e55d802553fa90e63d966b302006b45de5 (sudo -E to preserve env).  It seems like the -E option would be useful for most instances, but since you cannot guarantee that all versions of sudo support this flag can this be reverted and a config option be give to enable/disable this behavior?