[gupnp] (8 commits) Non-fast-forward update to branch wip/24

[Jens Georg <jensgeorg src gnome org>]

The branch 'wip/24' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  babad0f... service: Validate host header
  354f3e2... Tests: Add test for host header validation

Commits added to the branch:

  0cedf00... service-proxy: Fix introspection annotation (*)
  b430fd9... service-introspection: Make GI introspectable (*)
  4c64165... examples: Fix JavaScript example (*)
  098687e... examples: Add get-volume.py (*)
  8f33bef... examples: Add get-volme C example (*)
  4a68246... control-point: Hold a ref on control point while async down (*)
  ca6ec9d... service: Validate host header
  9751b5b... Tests: Add test for host header validation

(*) This commit already existed in another branch; no separate mail sent