Allow multiple --ssh-opt in command line

--ssh-opt is much more powerfull if it can be specified multiple times.

So allow that.

cmirror.c

@@ -285,7 +285,7 @@ static int reduce;
 static int force_status;
 static int bandwidth;
 static int allowremotefs;
-static char *ssh_opt;
+static char **ssh_opts;
 static int cksum;
 static int opt_nice;
 static int unix_socket;
@@ -1204,7 +1204,9 @@ static void master(char *master_path, char *target) {
                 char *s = g_strdup_printf("%s:%s", unix_socket_name, unix_socket_name);
                 g_ptr_array_add(args, s);
             }
-            if (ssh_opt) g_ptr_array_add(args, ssh_opt);
+            if (ssh_opts)
+                for (char **p = ssh_opts ; *p ; p++)
+                    g_ptr_array_add(args, *p);
             g_ptr_array_add(args, slave);
             g_ptr_array_add(args, "/usr/bin/cmirror");
             g_ptr_array_add(args, "--slave");
@@ -1457,6 +1459,7 @@ int main(int argc, char **argv) {
     }
 
     g_autoptr(GStrvBuilder) excepts_builder = g_strv_builder_new();
+    g_autoptr(GStrvBuilder) ssh_opts_builder = g_strv_builder_new();
     while (1) {
         int opt = getopt_long(argc, argv, "", options, NULL);
         if (opt == -1)
@@ -1470,7 +1473,7 @@ int main(int argc, char **argv) {
         else if (opt == 102)
             g_strv_builder_add(excepts_builder, g_strdup(optarg));
         else if (opt == 103)
-            ssh_opt = g_strdup(optarg);
+            g_strv_builder_add(ssh_opts_builder, g_strdup(optarg));
         else if (opt == 104)
             unix_socket_name = g_strdup(optarg);
         else if (opt == '?')
@@ -1479,6 +1482,7 @@ int main(int argc, char **argv) {
             die("internal error: getopt returned %d\n", opt);
     }
     excepts = g_strv_builder_end(excepts_builder);
+    ssh_opts = g_strv_builder_end(ssh_opts_builder);
     argv = &argv[optind];
     argc -= optind;