Renumber cursor option flags

Move the planner-control flags up so that there is more room for parse
options.  Some pending patches need some room there, so do this
renumbering separately so that there is less potential for conflicts.

src/include/nodes/parsenodes.h

@@ -2776,10 +2776,10 @@ typedef struct SecLabelStmt
 #define CURSOR_OPT_INSENSITIVE	0x0008	/* INSENSITIVE */
 #define CURSOR_OPT_HOLD			0x0010	/* WITH HOLD */
 /* these planner-control flags do not correspond to any SQL grammar: */
-#define CURSOR_OPT_FAST_PLAN	0x0020	/* prefer fast-start plan */
+#define CURSOR_OPT_FAST_PLAN	0x0100	/* prefer fast-start plan */
-#define CURSOR_OPT_GENERIC_PLAN 0x0040	/* force use of generic plan */
+#define CURSOR_OPT_GENERIC_PLAN 0x0200	/* force use of generic plan */
-#define CURSOR_OPT_CUSTOM_PLAN	0x0080	/* force use of custom plan */
+#define CURSOR_OPT_CUSTOM_PLAN	0x0400	/* force use of custom plan */
-#define CURSOR_OPT_PARALLEL_OK	0x0100	/* parallel mode OK */
+#define CURSOR_OPT_PARALLEL_OK	0x0800	/* parallel mode OK */
 
 typedef struct DeclareCursorStmt
 {