* Add Vcs-* fields.
* Wrap build-deps and deps.
* Merge Ubuntu changes with Debian tip:
  - Fix removed trailing spaces in old changelog entries.
  - Add description to dpatch 06_Xlib-Xcb-Hand-off-EXTEND_PAD-to-XRender.
  - Update descriptions of dpatches
    03_only_destroy_FT_Faces_created_by_cairo and 04_lcd_filter.
  - Drop dpatch 03_only_destroy_FT_Faces_created_by_cairo, merged upstream.
  - Remaining Ubuntu changes:
    * New dpatch, 04_lcd_filter, adds a Cairo LCD filter to use FreeType LCD
      colour filtering features; initial implementation from FreeDesktop
      #10301; build-deps and dep on libfontconfig1-dev >= 2.5.92 and
      libfreetype6-dev >= 2.3.5-1ubuntu4.
    * New disabled dpatch, 06_Xlib-Xcb-Hand-off-EXTEND_PAD-to-XRender, hand
      off EXTEND_PAD to XRender; LP #217908.
* Fix double patching in dpatch 06_Xlib-Xcb-Hand-off-EXTEND_PAD-to-
  XRender.
* Enable dpatch 06_Xlib-Xcb-Hand-off-EXTEND_PAD-to-XRender; LP: #217908.
* Use mode 755 for dpatches.