Add support for hiding passwords with dumb terminals

[gnodet]

JLine 1 had this hack:
https://github.com/jline/jline1/blob/master/src/main/java/jline/UnsupportedTerminal.java#L68-L86

It should be possible to add that back in the LineReadImpl when dealing with dumb terminals.

[BabitaSonavane]

@gnodet , when are you planning to add this fix in jline 3, I really need it for my issue raised #1170