Fix Mizar32 default IP from 193.168.1.10 to 192.168.1.10

A typo in the new build system config files set IP to 193.* with gateway
192.* which can never work.
Add check for console on USB serial port but USB CDC not enabled.

Before this, you could put the console on USB CDC without BUILD_USB_CDC
and eLua compiled OK but nothing worked. This change makes it spit out
an appropriate message if that should happen again.
Merge branch 'master' into SiM3U1xx_port
put random initialization after fs read to make timer at least dependent on FS contents