This ticket just explained why the --captcha
argument failed for multiple people: BusyBox doesn’t support arguments longer than 1024 (or something similar, if it’s not exactly that wording). It so happens fish
doesn’t suffer from the same limitation, which is why I wasn’t able to reproduce it myself. Better later than never …
RFC 4770 - vCard Extensions for Instant Messaging (IM)
vCard Extensions for Instant Messaging (IM) (RFC 4770)