Added example for new format of known_servers.yml

config/known_servers.yml.example

+# Configuration of NaviX: Cache to worker node location:
+# ------------------------------------------------------
+# <IP address/range of XRootD cache(s)>:
+#     wn_constraint: <string interpreted as HTCondor constraint for worker nodes>
+#     wn_ip: <IP range that is (optional, otherwise same as XRootD cache(s), currently in use for NaviXMon, not NaviX>
+#     cache_weight: <weight for each cache used for HTCondor Rank calculation (optional, otherwise default)>
+#
+# Example:
+#
+192.168.178.1/32:
+    wn_constraint: machine == "example.com"
+    wn_ip: 192.168.178.2/32
+    cache_weight: 100
\ No newline at end of file