Automatically split and submit long toots

[dredmorbius]

Splitting long toots at <= 500 characters (or other server / user-specified length), and submitting these, with numbering added, would be useful.

I've ginned up some crappy gawk that does the splits, though not submission:

https://pastebin.com/v3FXKxC3

Issues:

• Max sizes vary by server. 500 is a reasonable default.
• Unicode / multibyte characters.
• In replies, references to parent / other thread participants eats into character count.
• Widow/orphan protection would be useful.
• Mastodon isn't a long-form medium, even if some people space alien cats abuse it that way.