Perl and IBM i 7.2

I had Perl working on my 7.1 box. Installed 7.2 and now I get the
dreaded 'ZSRV_MSG0947: End of script output before headers' error. The
script log shows the darned thing running though:

===Begin===
%% 500 /QOpenSys/perl/webwrap/apachedft
%request
Host: my.host.name
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101
Firefox/31.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
%response
Content-type: text/plain

Hello, world!

===End===

The Apache web server went from 2.2 to 2.4. I read the API changes
document http://httpd.apache.org/docs/2.4/developer/new_api_2_4.html but
I can't tell how that applies to me. What (if any) 3rd party modules
provide the CGI support?

I also read the Memo to Users
http://www-01.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_72/rzaq9/rzaq9.pdf
(starting at page 43) and changed to Require all granted where I had
Allow from all but that made no difference.
--buck