you can do a xml-backup.
In the backup zip, you get the content in one single xml file. You can then analyse it with tools you prefer or write something to do so. Identifiing links should be easy in this file.
But there is nothing out of the box.
Here is the solutions for your question:
A. I need to identify ALL the links.
As mentioned by Steve, you can generate the xml backup and then use any text editor to separate and modify the links.
B. All the different links need to be identified/grouped.
My suggestion would be the Sublime text editor as it provides multi line edit and and also grouping of keywords by using CTRL + D.
C. All the links need to be changed to the new ones.
Multiline editing is possible or you can use find and replace to change the links.
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