OpenACS

This change corrects 2 bugs, causing the regression test to fail under certain circumstances:

1) use for test location [::acs::test::url] instead of [ad_url]

  The call [::acs::test::url] should be used for all tests in the regression tests and avoids

  problems with wrong URLs when running e.g. in a container

2) When running on a setup with self-signed certificates, the curl requests require a "-k"

  flag to be passed. Otherwise, the regression test fails.

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