renamed github flag to username based on feedback

main.go

@@ -20,7 +20,7 @@ var httpsFlag = flag.String("https", "", "Serve HTTPS at given address")
 var certFlag = flag.String("cert", "", "Use the provided TLS certificate")
 var keyFlag = flag.String("key", "", "Use the provided TLS key")
 var domainFlag = flag.String("domain", "gopkg.in", "Domain name")
-var githubFlag = flag.String("github", "", "Github username")
+var userFlag = flag.String("username", "", "Github username")
 
 func main() {
 	if err := run(); err != nil {
@@ -81,14 +81,13 @@ type Repo struct {
 
 // GitHubRoot returns the repository root at GitHub, without a schema.
 func (repo *Repo) GitHubRoot() string {
-	if *githubFlag != "" {
-		return "github.com/" + *githubFlag + "/" + repo.Name
+	if *userFlag != "" {
+		return "github.com/" + *userFlag + "/" + repo.Name
 	}
 	if repo.User == "" {
 		return "github.com/go-" + repo.Name + "/" + repo.Name
-	} else {
-		return "github.com/" + repo.User + "/" + repo.Name
 	}
+	return "github.com/" + repo.User + "/" + repo.Name
 }
 
 // GopkgRoot returns the package root at gopkg.in, without a schema.