Remove port when using headers in c.RealIP

Co-authored-by: Elwin Tamminga <elwintamminga@gmail.com>
Co-committed-by: Elwin Tamminga <elwintamminga@gmail.com>

context.go

@@ -105,14 +105,17 @@ func (c *Context) Get(key string) interface{} {
 
 // RealIP uses proxy headers for the real ip, if none exist the IP of the current connection is returned
 func (c *Context) RealIP() string {
+	reqIP := c.Request.RemoteAddr
+
 	if ip := c.Request.Header.Get(`X-Forwarded-For`); ip != `` {
-		return strings.Split(ip, `, `)[0]
+		reqIP = strings.Split(ip, `, `)[0]
+	} else if ip := c.Request.Header.Get(`X-Real-IP`); ip != `` {
+		reqIP = ip
 	}
 
-	if ip := c.Request.Header.Get(`X-Real-IP`); ip != `` {
-		return ip
+	ra, _, _ := net.SplitHostPort(reqIP)
+	if ra != `` {
+		reqIP = ra
 	}
-
-	ra, _, _ := net.SplitHostPort(c.Request.RemoteAddr)
-	return ra
+	return reqIP
 }