Update Zipkin OpenTracing driver to latest 0.4.3 release

docs/content/reference/static-configuration/cli-ref.md

@@ -561,11 +561,8 @@ Set the maximum character limit for Span names (default 0 = no limit). (Default:
 `--tracing.zipkin`:  
 Settings for Zipkin. (Default: ```false```)
 
-`--tracing.zipkin.debug`:  
-Enable Zipkin debug. (Default: ```false```)
-
 `--tracing.zipkin.httpendpoint`:  
-HTTP Endpoint to report traces to. (Default: ```http://localhost:9411/api/v1/spans```)
+HTTP Endpoint to report traces to. (Default: ```http://localhost:9411/api/v2/spans```)
 
 `--tracing.zipkin.id128bit`:  
 Use Zipkin 128 bit root span IDs. (Default: ```true```)

docs/content/reference/static-configuration/env-ref.md

@@ -561,11 +561,8 @@ Set the maximum character limit for Span names (default 0 = no limit). (Default:
 `TRAEFIK_TRACING_ZIPKIN`:  
 Settings for Zipkin. (Default: ```false```)
 
-`TRAEFIK_TRACING_ZIPKIN_DEBUG`:  
-Enable Zipkin debug. (Default: ```false```)
-
 `TRAEFIK_TRACING_ZIPKIN_HTTPENDPOINT`:  
-HTTP Endpoint to report traces to. (Default: ```http://localhost:9411/api/v1/spans```)
+HTTP Endpoint to report traces to. (Default: ```http://localhost:9411/api/v2/spans```)
 
 `TRAEFIK_TRACING_ZIPKIN_ID128BIT`:  
 Use Zipkin 128 bit root span IDs. (Default: ```true```)

docs/content/reference/static-configuration/file.toml

@@ -181,7 +181,6 @@
     httpEndpoint = "foobar"
     sameSpan = true
     id128Bit = true
-    debug = true
     sampleRate = 42.0
   [tracing.datadog]
     localAgentHostPort = "foobar"

docs/content/reference/static-configuration/file.yaml

@@ -186,7 +186,6 @@ tracing:
     httpEndpoint: foobar
     sameSpan: true
     id128Bit: true
-    debug: true
     sampleRate: 42
   datadog:
     localAgentHostPort: foobar