webui: add five mountpoints for user-provided webui pages

This is indended for addon developers, who can drop their new
pages under /www/user/ at boot time, and then customize menuTree.js
to insert links to them in the menu

release/src/router/www/Makefile

@@ -708,3 +708,9 @@ endif
 ifneq ($(RTCONFIG_DBLOG),y)
 	rm -rf $(INSTALLDIR)/www/images/New_ui/dblog_diag.gif
 endif
+
+	ln -sf user/user1.asp $(INSTALLDIR)/www/user1.asp
+	ln -sf user/user2.asp $(INSTALLDIR)/www/user2.asp
+	ln -sf user/user3.asp $(INSTALLDIR)/www/user3.asp
+	ln -sf user/user4.asp $(INSTALLDIR)/www/user4.asp
+	ln -sf user/user5.asp $(INSTALLDIR)/www/user5.asp