Pulsar Client Go

Improve

• Fixed batching flag logic
• Fix data race when accessing partition producer state
• Fixed tls connection issue
• Add flag to disable forced topic creation
• Add Athenz authentication provider
• Fixed race condition in producer Flush() operation
• Removed unnecessary flush in sync Send() operation
• Allow empty payload for nonbatch message
• Add internal connectionReader readAtLeast error information
• Fix zstd memory leak of zstdProvider
• Expose replicated from filed on message struct
• Fix send async comments
• Fix perf-produce cannot be closed
• Fix perf-producer target
• Fix fail to add batchbuilder
• skip debug print out when batch disabled with no messages
• Add check for max message size
• Build and test with multiple versions of Go
• When CGO is enabled, use C version of ZStd
• Stop partition discovery on Close
• Microbenchmark for compression
• Allow to have multiple connections per broker
• Increase writeRequestsCh channel buffer size