listen bucket: Support empty events from the server #1812
Merged
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Ask the server to send empty events in Listen Bucket API
With older MinIO versions, this would clear the whitespaces for the
scanner buffer, many whitespaces will make the scanner complains as it
needs a new line to clear some internal buffer.
With new MinIO version, ping=10 query will be considered and the server
will send empty events, instead of the whitespaces, each 10 seconds.