call fuse_daemonize before fuse_mount

This appears to be the right sequence and also fixes ObjC/fork issues on macOS
with macFUSE 5.2.0+ (see #373).

Author: dmik

sshfs.c

@@ -4512,6 +4512,12 @@ int main(int argc, char *argv[])
 		exit(1);
 	}
 
+	res = fuse_daemonize(sshfs.foreground);
+	if (res == -1) {
+		fuse_destroy(fuse);
+		exit(1);
+	}
+
 	res = fuse_mount(fuse, sshfs.mountpoint);
 	if (res != 0) {
 		fuse_destroy(fuse);
@@ -4535,13 +4541,6 @@ int main(int argc, char *argv[])
 		exit(1);
 	}
 
-	res = fuse_daemonize(sshfs.foreground);
-	if (res == -1) {
-		fuse_unmount(fuse);
-		fuse_destroy(fuse);
-		exit(1);
-	}
-
 	if (sshfs.singlethread)
 		res = fuse_loop(fuse);
 	else