Closes #300

Closes #301

Closes #298

Closes #296

Limited to 150 to account for {}, "" and commas in DB column

Closes #297

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/294

Closes #290

Originally from PR #288

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/287

`globSync` doesn't guarantee the order in which it returns the
matching paths, so without the `sort()`, the config files may be
merged differently each time the server is started

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/284

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/283

note length is now configurable through the config file

Closes #281

falls back to 3000 (misskey default) if not used/included in config