Merge branch 'mm/mediawiki-file-attachments'

Merge branch 'mm/mediawiki-file-attachments'

"mediawiki" remote helper (in contrib/) learned to handle file
attachments.

* mm/mediawiki-file-attachments:
  git-remote-mediawiki: improve support for non-English Wikis
  git-remote-mediawiki: import "File:" attachments
  git-remote-mediawiki: split get_mw_pages into smaller functions
  git-remote-mediawiki: send "File:" attachments to a remote wiki
  git-remote-mediawiki: don't "use encoding 'utf8';"
  git-remote-mediawiki: don't compute the diff when getting commit message