xrandr: update to 1.5.1.

Aaron Plattner (1):
      man: Document the new --filter option

Adam Simpkins (1):
      xrandr: fix crash if some modes cannot be found

Alan Coopersmith (2):
      Update README for gitlab migration
      Update configure.ac bug URL for gitlab migration

Emil Velikov (1):
      autogen.sh: use quoted string variables

Giuseppe Bilotta (8):
      xrandr: document that we accept '--dpi output'
      xrandr: suppress misleading indentation warning
      xrandr: allow a single value for --scale
      xrandr: stricter --scale argument parsing
      xrandr.man: grammar tuning
      xrandr: allow single value for --gamma
      xrandr.man: document the monitor manipulation options
      xrandr: gamma and scaling factors must be positive

Matt Turner (2):
      Build xz tarballs instead of bzip2
      xrandr 1.5.1

Mihail Konev (1):
      autogen: add default patch prefix

Pablo De La Garza (1):
      xrandr: Add a "--filter" flag

Pali Roh叩r (2):
      Document format of --dpi option in non-ambiguous way
      Document that --dpi and --fbmm options set DPI of whole X screen

Peter Hutterer (2):
      autogen.sh: use exec instead of waiting for configure to finish
      init the name to 0

Vladimir Panteleev (1):
      xrandr: Fix deleting inactive monitors

(wiz)