Update arf.json

Remove
- DeepDotWeb (RIP)
- https://dnstats.net/ (RIP)
- https://www.reddit.com/r/darknetmarkets (Suspended by reddit admins)

Add
- /r/darknet
- /r/onions

Tor Search.
Add the following popular .onion search engines.

- Candle
- Not Evil
- Dark.fail
- Tor66

public/arf.json

@@ -5711,6 +5711,26 @@
               "type": "url",
               "url": "http://www.onion.link/"
             },
+            {
+              "name": "Candle",
+              "type": "url",
+              "url": "http://gjobqjj7wyczbqie.onion/"
+            },
+            {
+              "name": "Not Evil",
+              "type": "url",
+              "url": "http://hss3uro2hsxfogfq.onion/"
+            },
+            {
+              "name": "Tor66",
+              "type": "url",
+              "url": "http://tor66sezptuu2nta.onion/"
+            },
+            {
+              "name": "dark.fail",
+              "type": "url",
+              "url": "http://darkfailllnkf4vf.onion/"
+            },
             {
               "name": "Ahmia",
               "type": "url",