DuckCorp » CyborgHood

search for the mail part containing orders

Previously only the first part was checked. Now multiparts are searched
recursively. The first 'text/plain' part found is taken as orders,
subsequent ones are treated as attachments like other parts with a
different MIME type.

This fixes problems with memoryhole protected-headers implemented in
recent Thunderbird/Enigmail and possibly other MUA's specific
constructs.