By default we're dealing with UTF-8 systems (wide char support by default), hence ncursesw headers are required for some software (like Vifm) on Debian.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
More unification for Vifm definition. It's now same on all supported OSes.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>