Log message:
net/tut: Update to 1.0.21

Changes in 1.0.18:
 - New: Support for setting the language of your toots.
 - Fixed: Create ~/.config if it doesn't exist.

Changes in 1.0.19:
 - New: New command :history and leader action history that lets you see
   the edit history of a toot.
 - New: Notifications when someone edits a toot you've boosted.
 - Fixed: An error from the editor shouldn't crash tut.

Changes in 1.0.20:
 - New: You can now follow and unfollow tags with :follow-tag tut and
   :unfollow-tag tut.
 - New: You can now add and remove users from lists. Run :lists and then
   you can use the keys that tut displays. This feature only works okay
   as it doesn't give you any response if the user is added to the list
   or not. But it works.
 - Fixed: An error from the terminal programs like lynx shouldn't crash
   tut.
 - Fixed: When you are reading a thread tut won't make unnecessary API
   requests.

Changes in 1.0.21:
 - New: You can now edit your toots, either by pressing E or typing
   :edit. If you want you can also use it as a leader and it is named
   edit.

Log message:
net/tut: Import tut-1.0.17 from wip

Text-based interface for Mastodon with vim-inspired keybindings and
support for shellout for editing text or viewing media.