Manpages of src:dpatch in Debian stretch-backports

• dh_dpatch_patch(1)
• dh_dpatch_unpatch(1)
• dpatch-convert-diffgz(1)
• dpatch-edit-patch(1)
• dpatch-list-patch(1)
• dpatch(1)
• dpatch(7)
• dpatch.make(7)