Note that we cannot just use make-targets from the recipe, because make without
any target is executed first, and then make ${make-targets} is executed, but in
this case we really need to have make depend called first.

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.