MM-211021

* XD Add B230400 to OSX/ttyS

*  D Add more tty.serialx devices to  OSX/sio-term-readline .

* XD What should be the default serial device  in  OSX/sio-term-readline ?

* XD Update the -h text for OSX

*  D B230400 fails with OSX 10.9.5 in virtualbox  ???????  also on Mac ?

* XD Bug in facility.mfp, line 229 : command line completion failed.
     os-type logic failure,
     * OSX must be updated, mfp extended

