cluster/kube: emergency fixes after evition

Some pods got evicted. Some of them broke.

  - postgres in matrix and nginx in internet because of the new policies
    (chown issues)
  - cas proxy in matrix because apparently the image was not reuploaded
    to the regsitry after ceph-waw1 died, and another node didn't have it
  - registry because it had a weak image pin an downgraded to some
    broken version on another node

Change-Id: I836036872629843c8ede1b7f67982112c90d71f0
diff --git a/app/matrix/prod.jsonnet b/app/matrix/prod.jsonnet
index 447fb99..30edabe 100644
--- a/app/matrix/prod.jsonnet
+++ b/app/matrix/prod.jsonnet
@@ -18,7 +18,7 @@
 
         synapseImage: "informatic/synapse:v1.2.1-env-conf-rev2", // https://github.com/Informatic/synapse/tree/env_config (to be upstreamed...)
         riotImage: "bubuntux/riot-web:v1.3.2",
-        casProxyImage: "registry.k0.hswaw.net/informatic/oauth2-cas-proxy:0.1.4"
+        casProxyImage: "registry.k0.hswaw.net/q3k/oauth2-cas-proxy:0.1.4"
     },
 
     metadata(component):: {