registering third party rest service with DNS/https enabled with SC throws error <java.lang.IllegalArgumentException: port not specified.>

We have a third party rest service with https enabled eg:`https://pos-dev.test.com`. We can register it to the service center.
But the gateway cannot route to it at run time and it is failing with the below error.

`
java.lang.IllegalArgumentException: port not specified.
`
And the service center instance is disabled eventually. Getting this error

`
{
"message": "No available address found."
}
`
How to handle this? Urgent info required

首先复现 issue 中描述的 HTTPS DNS 服务的注册和网关路由，然后跟踪 `port not specified` 异常经过服务发现和网关路由的过程。完成的标准是服务保持启用状态，网关能够成功路由请求，并且不再出现 `No available address found` 错误。

由索引模型根据 Issue 内容生成。