Escape unprintable characters in status JSON output read from magic key #2807
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…is implemented by escaping unprintable characters.
…th of string correctly.
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Status JSON returned from
\xff\xff/status/jsonwill have unprintable characters escaped. This resolves a truncation bug where null bytes would end the status string.Also updates the code to work even if it does encounter a null byte.
Resolves #2803.