Merge branch '3420_cleanup'

Merge branch '3420_cleanup'

* 3420_cleanup: (35 commits)
  Reimplement handling of ev_vfs_print_message_t message.
  Fix typos.
  Ticket #3539: fix reported -Wshadow warning with gcc 4.6.x
  (vfs_get_current_dir): avoid string duplication.
  mountlist: refactoring: reimplement mount list using GSList.
  Sync with gnulub c6148bca89e9465fd6ba3a10d273ec4cb58c2dbe.
  mcview: zero extension of char to int.
  Ticket #3522: (edit_suggest_current_word): fix memory leak.
  Ticket #3521: (edit_load_macro_cmd): fix memory leak.
  Ticket #3520: free editor macros when closing mc.
  (prepend_error_and_exit): fix format.
  Clarify __attribute ((format (printf))) usage.
  Fix calls of vfs_print_message().
  Fix calls of fish_command().
  (gauge_callback): fix draw of progress bar.
  Rename mcview_t back to WView to be consistent with other widget names.
  src/editor/editbuffer.c: fix typo.
  Add default cases for switch(){} construction in smbfs
  (nice_cd): use INPUT_LAST_TEXT.
  Ticket #3495:(edit_ext_cmd): use INPUT_LAST_TEXT.
  ...