I installed from scratch the new tomcatstack-7.0.35-0-osx-x86_64. I edited httpd.conf as described in http://answers.bitnami.org/questions/10205/mampstack-why-5_4_10-data-in-app-5_4_9-folder/10221 and moved htdocs to the location I designated in httpd.conf.
Similarly, I edited the tomcat conf/server.xml file to change appBase to a new location inside my user directory, then copied the entire bitnami/webapps tree to that location. And now Tomcat seems to work just fine with URL http://localhost:8080.
But how with this new stack do I access plain web pages using apache2? Obviously just http://localhost:8080 doesn't do it, as that brings up the Tomcat introductory page.
(P.S. Actually, which files and folders from bitnami/webapps do I need to copy into my relocated webapps folder?)