Commit 01f0ce40d8b4ea6c887bedc2cd4afc56e038491e

Allow tainted methods to be forwarded to HTTP::Headers [RT#38736]
  
410410 # We create the function here so that it will not need to be
411411 # autoloaded the next time.
412412 no strict 'refs';
413 *$method = eval "sub { shift->{'_headers'}->$method(\@_) }";
413 *$method = sub { shift->{'_headers'}->$method(@_) };
414414 goto &$method;
415415}
416416