Cleaner structure for AES256 hack in advance of adding link-layer to GNU Radio interface
Added CSP_O_DEFAULT and CSP_SO_DEFAULT defines to replace widespread use of CSP_O_NONE or '0'.  Needed to enact universal use of AES encryption
Create a seperate define since AIS, being an unmodifable CSP appliance, may need to be treated differently.
Changed CSP connections to use CSP_O_DEFAULT as the base instead of CSP_O_NONE or 0