Comment # 11 on bug 1024022 from Olaf Hering

This patch may help for the "=dir" case. But is it really correct?
What is "=dir" supposed to do? If its really "copy the entire directory
unconditional", why does it even look at the current host?
Also this host_only thing looks bogus. If it is known that a certain feature is
required, why would it matter if a given module has aliases or not?