Help: Add notes for topic 'custom-command-byproducts'
Remove disallowed feature which Borland did not accept.
Merge topic 'doc-drop-borland-workaround'

c2af447d Remove disallowed feature which Borland did not accept.
Merge topic 'custom-command-byproducts'

1f4f2aab Help: Add notes for topic 'custom-command-byproducts'