Fix #216728 better: if first link was duplicate a new ref was generated

Fix the 'printable' engine to display the page title.

Add taxonomy terms to the PF page (#214081)

Added access check to the print_insert_link function

Proper fix to the book_node_visitor_html_pre which was incorrectly committed with 'print' instead of 'view'

Fix #192855: If relative links start with '/' just append them to the server name (commit to 5.x-3.x-dev)

Enable choice of method to open the new window via radio boxes (now possible to select a Javascript XHTML Strict compliant method)