links() function insufficient for attributes other than `rel`

[daxim]

With v4 links() function it is not possible to set the type attribute, inter alia.

I propose that an interface variant is added where the function takes an array of objects, e.g.:

res.links([
    {
        href: 'http://api.example.com/users?page=2',
        rel: 'next',
        title: 'next chapter',
        type: 'text/plain;charset=UTF-8'
    },
    {
        href: 'http://api.example.com/users?page=5',
        rel: 'last',
        title: 'the grand finale',
        type: 'video/webm'
    }
]);

[dougwilson]

Sounds fine to me, we can certainly add something.

[tunniclm]

The following prs also attempt to address this: #2702 (which follows on from #2619).

[tunniclm]

#2702 incorporates some feedback from @dougwilson regarding validation of the provided keys which is not present in #2619 or #2575.