Remove deprecated OPTION_BOOLEAN for parsing arguments

As of b04ba2bb4 OPTION_BOOLEAN was deprecated.
This commit removes all occurrences of OPTION_BOOLEAN.
In b04ba2bb4 Junio suggested to replace it with either
OPTION_SET_INT or OPTION_COUNTUP instead. However a pattern, which
occurred often with the OPTION_BOOLEAN was a hidden boolean parameter.
So I defined OPT_HIDDEN_BOOL as an additional possible parse option
in parse-options.h to make life easy.

The OPT_HIDDEN_BOOL was used in checkout, clone, commit, show-ref.
The only exception, where there was need to fiddle with OPTION_SET_INT
was log and notes. However in these two files there is also a pattern,
so we could think of introducing OPT_NONEG_BOOL.

Signed-off-by: Stefan Beller <stefanbeller@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/notes.c b/builtin/notes.c
index e4100c4..8f63cb2 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -739,13 +739,13 @@
 			   N_("resolve notes conflicts using the given strategy "
 			      "(manual/ours/theirs/union/cat_sort_uniq)")),
 		OPT_GROUP(N_("Committing unmerged notes")),
-		{ OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
+		{ OPTION_SET_INT, 0, "commit", &do_commit, NULL,
 			N_("finalize notes merge by committing unmerged notes"),
-			PARSE_OPT_NOARG | PARSE_OPT_NONEG },
+			PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 1},
 		OPT_GROUP(N_("Aborting notes merge resolution")),
-		{ OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
+		{ OPTION_SET_INT, 0, "abort", &do_abort, NULL,
 			N_("abort notes merge"),
-			PARSE_OPT_NOARG | PARSE_OPT_NONEG },
+			PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 1},
 		OPT_END()
 	};