Add missing dependency to github.com/jlaffaye/ftp.
Add missing dependency to github.com/jlaffaye/ftp.

vincentbernat/aptly,ceocoder/aptly,smira/aptly,seaninspace/aptly,jola5/aptly,vincentbernat/aptly,aptly-dev/aptly,gearmover/aptly,jola5/aptly,scalp42/aptly,neolynx/aptly,sobczyk/aptly,adfinis-forks/aptly,sobczyk/aptly,bankonme/aptly,gdbdzgd/aptly,vincentbernat/aptly,scalp42/aptly,bsundsrud/aptly,gearmover/aptly,bsundsrud/aptly,jola5/aptly,gdbdzgd/aptly,smira/aptly,sobczyk/aptly,gdbdzgd/aptly,scalp42/aptly,seaninspace/aptly,smira/aptly,aptly-dev/aptly,seaninspace/aptly,adfinis-forks/aptly,neolynx/aptly,neolynx/aptly,bankonme/aptly,bsundsrud/aptly,ceocoder/aptly,adfinis-forks/aptly,bankonme/aptly,ceocoder/aptly,aptly-dev/aptly,gearmover/aptly