• Default for -M is now parallel (go routines per target) fetch and send results at the end by default, best for high latency targets, small payloads, use -multi-serial-mode for streaming results but one target at a time (low latency targets or large replies or to create serialized spans for testing)
• -M avoid double / in url, allows target to not specify missing http:// and better/cleaner code.
• Maximum delay for echo server is now configurable dynamically (was hardcoded to 1.5s max) #414