Don't invoke `trace_connect` callback twice#2670

janiversen merged 3 commits intopymodbus-dev:devpymodbus-dev/pymodbus:devfrom

erlend-aasland:gh-2669/multiple-invokations-of-trace-connecterlend-aasland/pymodbus:gh-2669/multiple-invokations-of-trace-connectCopy head branch name to clipboard