Add software rotation to unl0kr

Co-authored-by: craftyguy

man/unl0kr.1.scd

@@ -34,6 +34,14 @@ password is printed to STDOUT. All other output happens on STDERR.
 	horizontally by X pixels and vertically by Y pixels.
 *-d  --dpi=N*               
 	Override the display's DPI value.
+*-r, --rotate=[0-3]*
+	Rotate the UI to the given orientation. The
+	values match the ones provided by the kernel in
+	/sys/class/graphics/fbcon/rotate.
+	* 0 - normal orientation (0 degree)
+	* 1 - clockwise orientation (90 degrees)
+	* 2 - upside down orientation (180 degrees)
+	* 3 - counterclockwise orientation (270 degrees)
 *-h, --help*                
 	Print this message and exit.
 *-v, --verbose*