* multiarch support. FFe LP: #733501. * merge changes from upstream git: - Started work on Debhelper v9. It is still experimental, and more changes may be added to that mode. - Support multiarch in v9. Thanks, Steve Langasek. Closes: #617761 - dh_auto_configure: Support multiarch in v9 by passing multiarch directories to --libdir and --libexecdir. - dh_makeshlibs: Detect packages using multiarch directories and make ${misc:Pre-Depends} expand to multiarch-support. - Depend on dpkg-dev (>= 1.16.0) for multiarch support. Note to backporters: If you remove that dependency, debhelper will fall back to not doing multiarch stuff in v9 mode, which is probably what you want. * Add Daniel Silverstone's patch to give us env variable expansions in .install/.link files, needed in order to let us use DEB_HOST_MULTIARCH without cumbersome .in files everywhere. Closes: #614731.