Issue #206: Improve error messages for verbose feature
Issue #206: Improve error messages for verbose feature

This helps users who used incorrectly --verbose and --verbose-log-file
how to use those features right.

openprivacy/openscap,redhatrises/openscap,jan-cerny/openscap,mpreisler/openscap,redhatrises/openscap,ybznek/openscap,jan-cerny/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,openprivacy/openscap,mpreisler/openscap,OpenSCAP/openscap,openprivacy/openscap,redhatrises/openscap,OpenSCAP/openscap,ybznek/openscap,jan-cerny/openscap,redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,mpreisler/openscap,mpreisler/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,ybznek/openscap,Hexadorsimal/openscap,jan-cerny/openscap,openprivacy/openscap,openprivacy/openscap,jan-cerny/openscap,Hexadorsimal/openscap,ybznek/openscap,ybznek/openscap,jan-cerny/openscap,openprivacy/openscap,redhatrises/openscap,Hexadorsimal/openscap,redhatrises/openscap,mpreisler/openscap,ybznek/openscap