Enable experimental proxy via configuration option 'experimental_proxy'

Change-Id: I3c5532d661327e3be50153d1360f96b524c91f29
diff --git a/Changes b/Changes
index 2a9b902..1b44d5c 100755
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-0.35 2019-07-17
+0.35 2019-07-18
         - Added EXPERIMENTAL proxy to API route.
         - Remove deprecated api configuration
           (requires api_path instead now).
@@ -9,6 +9,8 @@
         - Introduced documentation on Cosmas 2.
         - Improved documentation on APIs.
         - Introduced documentation on FCS-QL (margaretha).
+        - Enable experimental proxy via
+          configuration option 'experimental_proxy'.
 
 0.34 2019-06-26
         - Introduced guided tour (hebasta, #19).