should be part of f13f9c09.

Add IPv6 support to smtp auth in nginx.

because webrunner uses only one IPv4 local address.

This has to be opt-in only as maybe we don't want it.

If match parameter is defined, it will grep this instead of URL.

Set to buildout['buildout']['parts-directory'] + name.
Used in 50% of the recipes.

Also add specific module for hexaglobe.