Mentioned that --delete-after and --delete-excluded imply --delete.

rsync.yo

@@ -485,11 +485,12 @@ destination.  You can override this with the --ignore-errors option.
 dit(bf(--delete-excluded)) In addition to deleting the files on the
 receiving side that are not on the sending side, this tells rsync to also
 delete any files on the receiving side that are excluded (see --exclude).
+Implies --delete.
 
 dit(bf(--delete-after)) By default rsync does file deletions before
 transferring files to try to ensure that there is sufficient space on
 the receiving filesystem. If you want to delete after transferring
-then use the --delete-after switch.
+then use the --delete-after switch. Implies --delete.
 
 dit(bf(--ignore-errors)) Tells --delete to go ahead and delete files
 even when there are IO errors.