Fix usage of taskd.trust=strict on the test suite

* This reverts commit 67cb30fdce.
* Code also now tests if taskd is listening on IPv4 or IPv6 interfaces.

test/basetest/task.py

@@ -99,7 +99,6 @@ class Task(object):
         self.config("taskd.certificate", cert)
         self.config("taskd.key", key)
         self.config("taskd.ca", self.taskd.ca_cert)
-        self.config("taskd.trust", "ignore hostname")
 
         address = ":".join((self.taskd.address, str(self.taskd.port)))
         self.config("taskd.server", address)