($legalnotice-link-file$ legalnotice)
Name of the output file for legal notices if %generate-legalnotice-link% is true. Since several legal notices may occur (in a Set of Books, for example), this is no longer a fixed filename.
(define ($legalnotice-link-file$ legalnotice) ;; Name of output file for legal notices (string-append "ln" (number->string (all-element-number legalnotice)) %html-ext%))