idn2 --no-tr64(was a no-op)
_as a basic code point in domain labels
idn2_to_ascii_4i()in favor of
idn2_to_ascii_4i()to 63 bytes
_idn2_punycode_decode()which were meant to be used internally only. The output needs additional checks to be used safely. This is the reason to for the SONAME bump, just in case.
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