[librsvg] (8 commits) ...Merge branch 'cleanup-clipping' into 'master'

[Federico Mena Quintero <federico src gnome org>]

Summary of changes:

  67002e6... draw_text: extract the clipping code path to its own little
  d51a04f... draw_text: make the stroke code path similar to the fill co
  48cea17... Inline the call to draw_children() inside clip_to_node()
  eb974cc... When clipping, only accept elements that can go inside a cl
  e08ad08... Restrict elements that can be reference from Use inside a c
  0064690... (#566): Restrict elements accepted inside a clipPath
  86a3a49... Use matches! instead of match
  8dfa5c6... Merge branch 'cleanup-clipping' into 'master'