[Conf] Add RBL_VIRUSFREE RBL

conf/modules.d/rbl.conf

@@ -115,6 +115,16 @@ rbl {
                 DNSWL_BLOCKED = "127.0.0.255";
             }
         }
+
+        # Provided by https://virusfree.cz
+        virusfree {
+            symbol = "RBL_VIRUSFREE_UNKNOWN";
+            rbl = "bip.virusfree.cz";
+            ipv6 = true;
+            returncodes {
+                RBL_VIRUSFREE_BLACK = "127.0.0.1";
+            }
+        }
     }
 
     .include(try=true,priority=5) "${DBDIR}/dynamic/rbl.conf"

conf/scores.d/rbl_group.conf

@@ -149,4 +149,9 @@ symbols = {
         weight = 1.0;
         description = "Address is listed in Spameatingmonkey RBL (ipv6)";
     }
+
+    "RBL_VIRUSFREE_BLACK" {
+        weight = 2.0;
+        description = "From address is listed in virusfree.cz BL";
+    }
 }