Test that IPv6-only clients can use microdescriptors

When running "make test-network-all", test that IPv6-only clients can use
microdescriptors. IPv6-only microdescriptor client support was fixed in
tor 0.3.0.1-alpha.

Requires chutney master 61c28b9 or later.

Closes ticket 24109.

changes/ticket24109

@@ -0,0 +1,4 @@
+  o Minor features (integration tests):
+    - Test that IPv6-only clients can use microdescriptors when running
+      "make test-network-all". Requires chutney master 61c28b9 or later.
+      Closes ticket 24109.

src/test/include.am

@@ -43,9 +43,9 @@ TEST_CHUTNEY_FLAVORS = basic-min bridges-min hs-v2-min hs-v3-min \
 	single-onion-v23
 # only run if we can ping6 ::1 (localhost)
 # IPv6-only v3 single onion services don't work yet, so we don't test the
-# single-onion-v23-ipv6 flavor
-TEST_CHUTNEY_FLAVORS_IPV6 = bridges+ipv6-min ipv6-exit-min hs-v23-ipv6 \
-	single-onion-ipv6
+# single-onion-v23-ipv6-md flavor
+TEST_CHUTNEY_FLAVORS_IPV6 = bridges+ipv6-min ipv6-exit-min hs-v23-ipv6-md \
+	single-onion-ipv6-md
 # only run if we can find a stable (or simply another) version of tor
 TEST_CHUTNEY_FLAVORS_MIXED = mixed+hs-v23