Log Message:
Update dialog to 1.3.20160126:

2016/01/26 - release 1.3
	+ correct --infobox documentation, which said it shows an OK button.
	+ fix a couple of place in test-scripts which referred to $SIG_TRAP
	  rather than $SIG_QUIT
	+ reorganize dialog.3, to use subsections for generating navigation
	  pane, using man2html
	+ add "--week-start" option for calendar widget (prompted by discussion
	  with Stefan Vogtner).
	+ add a limit-check in editbox.c to ensure that mouse-clicks outside
	  the filled-in text area do not access past the end of the array
	  (report by Stefan Vogtner).
	+ update configure macros from ncurses changes.
	+ update config.guess, config.sub