Parse links in LSP comments

Since we already parse links in the descrpitions, it'd be really nice if links inside comments are parsed too.

Now its really hard to follow a link like this:

The preg_replace code for links can surely be reused, but it should look like this

``` php
$message = preg_replace('#\b((https?://)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.])+)#i', '$1', $message);
```

rather than this

``` php
$message = preg_replace('#([^"])\b((https?://)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.])+)#i', '$1$2', $message);
```

Because there are no `iframes` in the comments so the 'don't parse if there is an " before the link' hack isn't needed.

Start by finding the existing link parsing used for descriptions and the code that renders LSP comments. Confirm the comment path applies the requested link parsing without iframe-specific handling, then verify that a plain URL and the supplied image URL are rendered as links.

Written by the indexing model from the issue text.