How to set link field to unlimited values in D7

In Drupal 6, when I added a link field in CCK I was presented with a selector that allowed me to choose the number of link values that should be available to the poster: 1, 2, 3, ... up to unlimited. Then when the user posted an entry with the link fields, however many fields I defined when creating the content type would be possible.

I want to set a content type with an unlimited value of link fields, but I see no widget for selecting the number of values. The only way I can see to achieve multiple link fields is to add the number of links I require individually when creating the content type. Obviously this makes it impossible to set an "unlimited" number of available link fields. It would also be tedious to have to add multiple link fields individually upon creation of the content type, rather than simply adding one field and selecting the number of values that should be made available to the user.

Am I missing something? Could someone please tell me how to select the number of link fields that should be made available to the user?

Thank you.