~ubuntu-branches/debian/sid/alpine/sid

* Imported Upstream version 2.20+dfsg1
  - Drop patches applied upstream.
  - Refresh remaining patches.
  - d/rules: Update SHA256 for alpine 2.20.
* Update Standards-Version to 3.9.6.
* d/watch: Narrow the regex to only match source tarballs.
* d/alpine-doc.docs: tech-notes.txt moved to under the tech-notes/ dir.
* d/control: Update Vcs-Browser for cgit.
* d/p/10_alpine_1.10_spooldir.patch: Fix a few more references.
* d/p/40_fix_browser_hardcoded_paths.patch:
  - Fix hardcoded paths to specific browsers.
* d/p/40_fix_tech_notes_hardcoded_paths.patch, d/rules:
  - Drop patch in favor of changing paths after the build.