add: lift the pathspec magic restriction on "add -p"

Since 480ca64 (convert run_add_interactive to use struct pathspec -
2013-07-14), we have unconditionally passed :(prefix)xxx to
add-interactive.perl. It implies that all commands
add-interactive.perl calls must be aware of pathspec magic, or
:(prefix) is barfed. The restriction to :/ only becomes unnecessary.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/add.c

@@ -270,13 +270,7 @@ int interactive_add(int argc, const char **argv, const char *prefix, int patch)
 {
 	struct pathspec pathspec;
 
-	/*
-	 * git-add--interactive itself does not parse pathspec. It
-	 * simply passes the pathspec to other builtin commands. Let's
-	 * hope all of them support all magic, or we'll need to limit
-	 * the magic here.
-	 */
-	parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC & ~PATHSPEC_FROMTOP,
+	parse_pathspec(&pathspec, 0,
 		       PATHSPEC_PREFER_FULL |
 		       PATHSPEC_SYMLINK_LEADING_PATH |
 		       PATHSPEC_PREFIX_ORIGIN,

builtin/checkout.c

@@ -1149,13 +1149,6 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 	}
 
 	if (argc) {
-		/*
-		 * In patch mode (opts.patch_mode != 0), we pass the
-		 * pathspec to an external program, git-add--interactive.
-		 * Do not accept any kind of magic that that program
-		 * cannot handle. Magic mask is pretty safe to be
-		 * lifted for new magic when opts.patch_mode == 0.
-		 */
 		parse_pathspec(&opts.pathspec, 0,
 			       opts.patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0,
 			       prefix, argv);