Fix OpenSSH Apple Keychain getopt

gistfile1.txt

diff --git a/ssh-add.c b/ssh-add.c
index 10c968a..84f24d6 100644
--- a/ssh-add.c
+++ b/ssh-add.c
@@ -457,7 +457,7 @@ main(int argc, char **argv)
 		    "Could not open a connection to your authentication agent.\n");
 		exit(2);
 	}
-	while ((ch = getopt(argc, argv, "kKlLcdDxXe:s:t:")) != -1) {
+	while ((ch = getopt(argc, argv, "kKlLcdDxXmMe:s:t:")) != -1) {
 		switch (ch) {
 		case 'k':
 			key_only = 1;