You can no longer use the search box to redirect off site. This was a security fix.
It still works in posts, however ddg://Perl, for example.
And in-site links should still work, even in the search box. id://381608, for example.
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If you still need to find out how a link will be translated by PerlMonks, you can use handlelinks xml generator with the link query parameter containing the shortcut.
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]
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