Add example config file for using hivemind as a tags/follows replacement with jussi

EXAMPLE_hivemind_upstream_config.json

+{
+    "limits": {
+      "accounts_blacklist": [
+        "accounttoblock"
+      ]
+    },
+    "upstreams": [
+      {
+        "name": "steemd",
+        "translate_to_appbase": true,
+        "urls": [
+          [
+            "steemd",
+            "https://your.steemd.url"
+          ]
+        ],
+        "ttls": [
+          [
+            "steemd",
+            3
+          ]
+        ],
+        "timeouts": [
+          [
+            "steemd",
+            3
+          ]
+        ]
+      },
+      {
+        "name": "appbase",
+        "urls": [
+          [
+            "appbase",
+            "https://your.steemd.url"
+          ],
+          [
+            "appbase.account_history_api",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_account_history",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_ops_in_block",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_followers",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_following",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_follow_count",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_trending",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_hot",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_promoted",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_created",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_blog",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_feed",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_comments",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_replies_by_last_update",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_trending_tags",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_discussions_by_author_before_date",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_post_discussions_by_payout",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_comment_discussions_by_payout",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_blog",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_blog_entries",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_account_votes",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_state",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['witnesses']",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/witnesses']",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/~witnesses']",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['~witnesses']",
+            "https://your.account.history.steemd.url"
+          ],
+          [
+            "appbase.follow_api",
+            "https://your.hivemind.url"
+          ],
+          [
+            "appbase.tags_api",
+            "https://your.hivemind.url"
+          ]
+        ],
+        "ttls": [
+          [
+            "appbase",
+            3
+          ],
+          [
+            "appbase.login_api",
+            -1
+          ],
+          [
+            "appbase.network_broadcast_api",
+            -1
+          ],
+          [
+            "appbase.follow_api",
+            10
+          ],
+          [
+            "appbase.market_history_api",
+            1
+          ],
+          [
+            "appbase.condenser_api",
+            3
+          ],
+          [
+            "appbase.condenser_api.get_block",
+            -2
+          ],
+          [
+            "appbase.condenser_api.get_block_header",
+            -2
+          ],
+          [
+            "appbase.condenser_api.get_content",
+            1
+          ],
+          [
+            "appbase.condenser_api.get_state",
+            1
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/trending']",
+            30
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['trending']",
+            30
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/hot']",
+            30
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/welcome']",
+            30
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/promoted']",
+            30
+          ],
+          [
+            "appbase.condenser_api.get_state.params=['/created']",
+            10
+          ],
+          [
+            "appbase.condenser_api.get_dynamic_global_properties",
+            1
+          ]
+        ],
+        "timeouts": [
+          [
+            "appbase",
+            3
+          ],
+          [
+            "appbase.network_broadcast_api",
+            0
+          ],
+          [
+            "appbase.chain_api.push_block",
+            0
+          ],
+          [
+            "appbase.chain_api.push_transaction",
+            0
+          ],
+          [
+            "appbase.condenser_api.broadcast_block",
+            0
+          ],
+          [
+            "appbase.condenser_api.broadcast_transaction",
+            0
+          ],
+          [
+            "appbase.condenser_api.broadcast_transaction_synchronous",
+            0
+          ],
+          [
+            "appbase.condenser_api.get_account_votes",
+            20
+          ],
+          [
+            "appbase.condenser_api.get_ops_in_block.params=[2889020,false]",
+            20
+          ],
+          [
+            "appbase.account_history_api.get_ops_in_block.params={\"block_num\":2889020,\"only_virtual\":false}",
+            20
+          ]
+        ]
+      },
+      {
+        "name": "hive",
+        "urls": [
+          [
+            "hive",
+            "https://your.hivemind.url"
+          ]
+        ],
+        "ttls": [
+          [
+            "hive",
+            -1
+          ]
+        ],
+        "timeouts": [
+          [
+            "hive",
+            30
+          ]
+        ]
+      }
+    ]
+  }