[213] XfrIn is special

Readded as it got lost in the merges somewhere.

src/bin/bind10/bob.spec

@@ -14,7 +14,7 @@
             "priority": 5,
             "kind": "dispensable"
           },
-          "b10-xfrin": { "address": "Xfrin", "kind": "dispensable" },
+          "b10-xfrin": { "special": "xfrin", "kind": "dispensable" },
           "b10-xfrout": { "address": "Xfrout", "kind": "dispensable" },
           "b10-zonemgr": { "address": "Zonemgr", "kind": "dispensable" },
           "b10-stats": { "address": "Stats", "kind": "dispensable" },