Wavefront Libraries 4.21

Proxy: Configurable httpClient connection settings (httpMaxConnTotal, httpMaxConnPerRoute, httpAutoRetries)
Proxy: Fixed bug with handling of blocked points
Proxy: Make timestamp field in OpenTSDB/HTTP format optional
Proxy: Fixed bug with "version" command in OpenTSDB/HTTP protocol not working properly
Proxy: Warn when attempting to start proxy as a service under docker
Proxy: Fixed bug with buffer.queue-time metric being skewed on systems with clock drift
Proxy: Accept sourceTag metadata and data points on the same port
Proxy: Configurable maxBurstSeconds for the rate limiter (default to 10 to match the back-end configuration)
java-lib: Sanitize dynamically generated JVM metric names
java-lib: Improve performance of WavefrontHistogram