tools/afcclient: Start in /Documents when using --documents

When using `--documents`, access is usually restricted to `/Documents`
so let's start in `/Documents`.

tools/afcclient.c

diff --git a/tools/afcclient.c b/tools/afcclient.c
index e71aea4..c2e2ce3 100644
--- a/tools/afcclient.c
+++ b/tools/afcclient.c
@@ -1618,8 +1618,13 @@
 		lockdownd_client_free(lockdown);
 		lockdown = NULL;
 
-		curdir = strdup("/");
-		curdir_len = 1;
+		if (appid && !use_container) {
+			curdir = strdup("/Documents");
+			curdir_len = 10;
+		} else {
+			curdir = strdup("/");
+			curdir_len = 1;
+		}
 
 		if (argc > 0) {
 			// command line mode