Merge pull request #44 from signalfx/record-value-max-length-docs

Added recorded max value docs

README.md

@@ -41,6 +41,7 @@ If the default configuration values don't apply for your environment, override t
 | [WithEndpointURL](https://godoc.org/github.com/signalfx/signalfx-go-tracing/tracing/#WithEndpointURL) | `SIGNALFX_ENDPOINT_URL` | `http://localhost:9080/v1/trace` | The URL to send traces to. Send spans to a Smart Agent, OpenTelemetry Collector, or a SignalFx ingest endpoint.  |
 | [WithAccessToken](https://godoc.org/github.com/signalfx/signalfx-go-tracing/tracing/#WithAccessToken) | `SIGNALFX_ACCESS_TOKEN` | none | The access token for your SignalFx organization. |
 | [WithGlobalTag](https://godoc.org/github.com/signalfx/signalfx-go-tracing/tracing/#WithGlobalTag) | `SIGNALFX_SPAN_TAGS` | none | Comma-separated list of tags included in every reported span. For example, "key1:val1,key2:val2". Use only string values for tags.|
+| [WithRecordedValueMaxLength](https://godoc.org/github.com/signalfx/signalfx-go-tracing/tracing/#WithRecordedValueMaxLength) | `SIGNALFX_RECORDED_VALUE_MAX_LENGTH` | 1200 | The maximum number of characters for any Zipkin-encoded tagged or logged value. Behaviour disabled when set to -1. |
 
 ## Instrument a Go application