The [name=] can't hold links anymore

### Is this a hackmd.io issue?

- [x] Yes, the bug happens on https://hackmd.io

### What's the problem

```
>foo
>[name=[bar](http://google.com)]
```
Shows as:

and

```
>foo
>[name=]
```
shows as


#### Expected behaviour

Before it was parsed as a link

Imagine, that 'bar' is active link, highlited in blue:

In second case it should just be an active link

#### Environment

I use HackMD on:

**Desktop**
- OS: Ubuntu 20.04
- Browser: Firefox
- Browser Version: 78.0.2