https://gitlab.synchro.net/main/sbbs/-/issues/408#note_2588
FWIW: here's the exchange about this from IRC the other day...`[202205171444-0400] <nelgin> evnt QNET !JavaScript /sbbs/exec/load/ftp.js line 358: Error: Invalid response: 4[202205171444-0400] <nelgin> what's invalid repsonse 4?[202205171445-0400] <DigitalMan> the response was '4', which is not a valid FTP response code`
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