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.

cloudooo-instance is already implicitly pulled by
publish-cloudooo-connection-information.

cloudooo-json does not exist in parameter_dict.

Follow up c902ed4b.

Because "gets is a security hole - use fgets instead" and this function is not
available anymore in recent environments.

Also depend on patch change, as it shall lead to recompilation.

Also put back certificates on software release url.

This is the only remote url which is going to be trusted outside of buildout.

Fetching list of keys over the network from non signed url has no sense.

This reverts commit 11150b66.

Hack was needed in damaged environment, which did not managed to have correct
symlinks.

On some platforms it is required.