Variables and functions supporting Term::ReadLine::Perl5's command history. This pretends to be OO code even though it isn't. It makes use of global package variables and wraps that up as an object to pass to the corresponding OO routine.
The underlying OO routines are in Term::ReadLine::Perl5::OO::History.
Insert $line into history list if $line is:
bigger than the minimal length $minlength
not same as last entry