Log Message:
nano: Update to 5.3

Add missing tools. Use NetBSD curses where possible.

2020.10.07 - GNU nano 5.3 "Revolution!"
• Option 'set stateflags' makes nano show the state of auto-indenting,
  the mark, hard-wrapping, macro recording, and soft-wrapping in the
  title bar.  The flags take the place of "Modified", and a modified
  buffer is instead indicated by an asterisk (*) after its name.
• Nano no longer by default tries using libmagic to determine the type
  of a file (when neither filename nor first line gave a clue), because
  in most cases it is a waste of time.  It requires using the option
  --magic or -! or 'set magic' to make nano try libmagic.
• The color of the indicator can be changed with 'set scrollercolor'.

2020.08.24 - GNU nano 5.2 "Ranrapalca"
• Making certain replacements after a large paste does not crash.
• Hitting a toggle at the Search prompt does not clear the answer.
• Using --positionlog does not complain at the first start.
• A macro containing a Search command will not sometimes fail.