Also, make it optional.

Unused since egg bump from commit 80bfb5e0 .

It is not used in xwiki and lamp, does not work out of the box in erp5, and
prevents erp5 from moving further toward IPv6 support.
Do not drop its component SR and recipe just yet, as it might find some
use in the near future.

This reverts commit e9b76a68.
When kumo is built with IPv6 support, it stops supporting IPv4, which
breaks existing SRs.

Based on work by Romain Courteaud <romain@nexedi.com>.

Made possible with Nexedi's buildout, which de-serialises python types
transparently.

Based on work by Romain Courteaud <romain@nexedi.com>.

add --disable-groonga-httpd instead of --disable-nginx to follow changes in groonga's configure script

version up : Java Runtime 7 Update 7 / 6 Update 35. remove JDK because we don't use it and we have no URL that requires no interaction.

Kept backward compatibility about "production" software_type.

version down : LibreOffice 3.5.6, that is the newer version for 3.5.x. LibreOffice 3.6.0 still has several issues, extension for exporting text is not txt but csv, and style.xml does not pass relaxng valiation.