add connmgr section

Author: hsanjuan

roles/ipfs/templates/home/ipfs/ipfs_default_config

@@ -185,7 +185,12 @@
       "Security": {},
       "Multiplexers": {}
     },
-    "ConnMgr": {},
+    "ConnMgr": {
+      "Type": "basic",
+      "LowWater": {{ ipfs_connmgr_low_water }},
+      "HighWater": {{ ipfs_connmgr_high_water }},
+      "GracePeriod": "30s"
+    },
     "ResourceMgr": {
       "MaxMemory": "{{ ipfs_resourcemgr_max_memory | default(0) }}"
     }