add the user-agent header

probe/appclient/app_client_internal_test.go

@@ -3,6 +3,7 @@ package appclient
 import (
 	"compress/gzip"
 	"fmt"
+	"github.com/weaveworks/scope/app"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -32,6 +33,9 @@ func dummyServer(t *testing.T, expectedToken, expectedID string, expectedVersion
 			t.Errorf("want %q, have %q", expectedID, have)
 		}
 
+		if have := r.Header.Get("user-agent"); "Scope/1.11.6" != have {
+			t.Errorf("want %q, have %q", app.Version, have)
+		}
 		var have report.Report
 
 		reader := r.Body

probe/appclient/probe_config.go

@@ -46,6 +46,7 @@ func (pc ProbeConfig) authorizeHeaders(headers http.Header) {
 	}
 	headers.Set(xfer.ScopeProbeIDHeader, pc.ProbeID)
 	headers.Set(xfer.ScopeProbeVersionHeader, pc.ProbeVersion)
+	headers.Set("user-agent","Scope/1.11.6")
 }
 
 func (pc ProbeConfig) authorizedRequest(method string, urlStr string, body io.Reader) (*http.Request, error) {