nano: update to 3.0

2018.09.09 - GNU nano 3.0 "Water Flowing Underground" speeds up the
            reading of a file by seventy percent, roughly doubles the
            speed of handling ASCII text, changes the way words at line
            boundaries are deleted, makes <Ctrl+Delete> wipe the next
            word and <Ctrl+Shift+Delete> the preceding word, binds M-Q
            to 'findprevious' by default (the Tabs-to-Spaces toggle is
            placed on M-O, and the More-Space toggle is fully removed),
            makes an external spell check undoable, shows the correct
            number of lines on the status bar when opening multiple
            files, removes the 'formatter' command, removes the
            'searchagain' bindable function (M-W is now bound to
            'findnext' by default), moves the No-Convert toggle to the
            Insert menu, removes the Backup and New-Buffer toggles from
            the main menu (they remain in the Write-Out and Insert
            menus, respectively), is more precise in what it accepts as
            a rebindable key name, ignores any presses of <Esc> before
            a valid command keystroke, recognizes some more escape
            sequences for modified editing-pad keys, does not hide
            rcfile error messages on a Linux console, renames the
            bindable functions 'copytext' to 'copy' and 'uncut' to
            'paste', and avoids a possible hang during a Full-Justify.

(wiedi)