Console: Add Referrer-Policy header

...2psnark/java/src/org/klomp/snark/web/I2PSnarkServlet.java

...va/src/net/i2p/i2ptunnel/localServer/LocalHTTPServer.java

apps/i2ptunnel/jsp/edit.jsp

apps/i2ptunnel/jsp/index.jsp

apps/i2ptunnel/jsp/wizard.jsp

apps/routerconsole/jsp/css.jsi

apps/susidns/src/jsp/addressbook.jsp

apps/susidns/src/jsp/config.jsp

apps/susidns/src/jsp/details.jsp

apps/susidns/src/jsp/index.jsp

apps/susidns/src/jsp/subscriptions.jsp

apps/susimail/src/src/i2p/susi/webmail/WebMail.java

installer/resources/proxy/ahelper-conflict-header.ht

installer/resources/proxy/ahelper-new-header.ht

installer/resources/proxy/dnfh-header.ht