Resolves: #1967213 - build the curl tool without metalink support
    
    Today curl upstream announced that they are going to completely remove
    support for metalink from curl already in the next release of curl due
    to a number of difficult to fix security issues:
    
        https://curl.se/mail/archive-2021-06/0006.html
        https://github.com/curl/curl/pull/7176