Packaging cleanup

* Declare compliance with policy 4.5.1
* Bump debhelper compat level to 13
* Update debian/watch to version 4
* Re-organize patch queue

debian/control

@@ -1,10 +1,10 @@
 Source: tang
 Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 Homepage: https://github.com/latchset/tang
-Standards-Version: 4.5.0
+Standards-Version: 4.5.1
 Vcs-Browser: https://git.in-ulm.de/cbiedl/tang
 Vcs-Git: https://git.in-ulm.de/cbiedl/tang.git
-Build-Depends: debhelper-compat (= 12),
+Build-Depends: debhelper-compat (= 13),
     asciidoctor,
     curl,
     jose,

debian/patches/series

@@ -1,7 +1,7 @@
 
 # cherry-picked commits. Keep in upstream's chronological order
-cherry-pick.v7-4-g7778512.fixed-ordering-cycle-found-causing-spurious-issues-during-boot-no.patch
+cherry-pick/1580371641.v7-4-g7778512.fixed-ordering-cycle-found-causing-spurious-issues-during-boot-no.patch
 
 # patches for upstream
-upstream.use-asciidoctor-to-build-manpages.patch
-upstream.add-systemd-documentation-key.patch
+for-upstream/2018-08-11.use-asciidoctor-to-build-manpages.patch
+for-upstream/2018-08-12.add-systemd-documentation-key.patch

debian/watch

@@ -1,4 +1,4 @@
 
-version=3
-https://github.com/latchset/tang/releases \
-    /latchset/tang/releases/download/[^/]+/tang-([0-9][.0-9]*)\.tar\.bz2
+version=4
+https://github.com/latchset/@PACKAGE@/releases \
+    /latchset/@PACKAGE@/releases/download/[^/]+/@PACKAGE@-([0-9][.0-9]*)@ARCHIVE_EXT@