dsync: fix -L,--dereference option ignored (#625)

This commit fixes dsync ignoring -L,--dereference option because of a
missing break in the case statement, causing walk/copy options to be
overwritten by -P,--no-dereference values.

Signed-off-by: Rémi Palancher <[email protected]>

Author: rezib

Diff for: src/dsync/dsync.c

@@ -3171,6 +3171,7 @@ int main(int argc, char **argv)
             copy_opts->dereference = 1;
             walk_opts->dereference = 1;
             copy_opts->no_dereference = 0;
+            break;
         case 'P':
             /* turn on no_dereference.
              * turn off dereference */