DocBook > MD conversion fails for internal links and anchors

Input DocBook:

``` docbook
<simpara><link linkend="abc">Do ABC</link></simpara>
...
<section id="abc">
<title>1. Do ABC</title>
```

Output Markdown:

```
[Do ABC](#abc)

...
## 1. Do ABC
```

Expected/Desired Output:

```
[Do ABC](#abc)

...
## 1. Do ABC ## {#abc}
```

Conversion Command Used:
`pandoc abc.xml -f docbook -t markdown --no-wrap --atx-headers --base-header-level=2 -o abc.md`
