This fixes a bug where  peer could miss pieces btpd got while the
peer was in handshake.

Also, btpd now sends multiple have messages instead of a bitfield
when it's better to do so.

*) Don't call names.
*) Don't think it's neccessary to include fixing of general bugs.

git-svn-id: file:///home/rnyberg/svngit/btpd/releases/0.1@1 76a1f634-46fa-0310-9943-bd1476092a85