/ curl Public
STARTTLS: Don't print response character in denied messages #1203
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Both IMAP and POP3 response characters are used internally, but when
appended to the STARTTLS denial message likely could confuse the user.
If nobody likes this there is still the problem if the response code is set -1 and that's printed as a character. At the very least I think we should do something like
(ISALPHA(resp) ? resp : ' ')so that we don't print weird symbols. SMTP doesn't have this problem because libcurl is using its numeric response codes, so I've already fixed that separately in 4e6f483