so that responses without max-age will not be cached.

This revert e7083872. This change must be applied
only when we will have newer version of slapos.cookbook

(cherry picked from commit ea3bc600)

older pod2man does not recognise --errors.
anyway we should just skip make in doc directory.

Buildout output is less scary this way.

Buildout output is less scary this way.

recent pod2man version does not work with wget documentation and make the whole compilation failed