Once set, the default filter is updated.  This means that
toggle dot will also work as expected when noice is executed
as root.

Based on discussion with Ypnose.

Diff by Ypnose

Diff by Ypnose

The magic.mgc file gets created in the local directory, opening
the global file throws unwanted messages. So we are using the o/p
of the file command to determine if the file is a plain text file.

Use mpv, fmedia, zathura.
Invoke libmagic to identify text files and open with vim.
Use xdg-open for unhandled mimes.

NetBSD has its own curses implementation and initscr() does not
terminate with an error if TERM is not set properly.

Instead check the return value and exit if an initialization
error occurs.

Original patch written by Richard Hyde and taken from
https://github.com/RichardHyde/noice

Patch written by Richard Hyde and taken from
https://github.com/RichardHyde/noice

It should be the size of the destination buffer, not the source.

In this case, both src and dest have the same size.

This is more descriptive for a global variable which
can easily be shadowed.