Disable phone-home calls / anonymous usage reporting

Index: lib/build/build.go
--- lib/build/build.go.orig
+++ lib/build/build.go
@@ -73,7 +73,7 @@ func setBuildData() {
 
 	exp := regexp.MustCompile(`^v\d+\.\d+\.\d+(-[a-z]+[\d\.]+)?$`)
 	IsRelease = exp.MatchString(Version)
-	IsCandidate = strings.Contains(Version, "-rc.")
+	IsCandidate = false
 	IsBeta = strings.Contains(Version, "-")
 
 	stamp, _ := strconv.Atoi(Stamp)