patch 8.0.1792: MS-Windows users expect -? to work like --help

Problem:    MS-Windows users expect -? to work like --help.
Solution:   Add -?. (Christian Brabandt, closes #2867)

src/main.c

@@ -2014,6 +2014,7 @@ command_line_scan(mparm_T *parmp)
 #endif
 		break;
 
+	    case '?':		/* "-?" give help message (for MS-Windows) */
 	    case 'h':		/* "-h" give help message */
 #ifdef FEAT_GUI_GNOME
 		/* Tell usage() to exit for "gvim". */

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1792,
 /**/
     1791,
 /**/