[libsoup] (3 commits) Non-fast-forward update to branch carlosgc/headers-no-intern

[Carlos Garcia Campos <carlosgc src gnome org>]

The branch 'carlosgc/headers-no-intern' 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:

  1bc6f61... headers: stop interning all header names
  a0d3b85... Use header fast paths internally whenever possible

Commits added to the branch:

  61afb7a... docker: Add gperf to image
  f513606... headers: stop interning all header names
  7291e56... Use header fast paths internally whenever possible