I'm submitting the following patch, result of many corrections thanks to tests on all release architectures and kfreebsd-i386.
Seriously, this is an untested patch which I think is quite important to apply for Etch. We released Sarge without the PHP version recommended by upstream, and thankfully upstream provided security support for PHP 4 up to now, but shipping PHP 4 "by default" in Etch doesn't look good, given the state of upstream security in general and the time since PHP 4 was replaced. It is too late to remove PHP 4 from Etch but I expect it to have inappropriate support similar to what happened in woody, so we should avoid making it the default version. Please let me know if you have a reason not to apply this patch.
--- web-server 2005-08-24 21:40:18.000000000 -0400 +++ web-server.5 2007-03-02 18:04:18.000000000 -0500 @@ -9,7 +9,7 @@ Packages: task-fields Packages-list: apache2-doc - libapache2-mod-php4 + libapache2-mod-php5 libapache2-mod-perl2 libapache2-mod-python analog