cnct: instantiate quit channels inside resolvers

Removes a bug-prone construction that existed previously where the quit
channel was replaced just-in-time.

contractcourt/htlc_timeout_resolver.go

@@ -48,7 +48,7 @@ type htlcTimeoutResolver struct {
 	// account any fees that may have to be paid if it goes on chain.
 	htlcAmt lnwire.MilliSatoshi
 
-	ResolverKit
+	contractResolverKit
 }
 
 // ResolverKey returns an identifier which should be globally unique for this
@@ -436,13 +436,13 @@ func (h *htlcTimeoutResolver) Decode(r io.Reader) error {
 	return nil
 }
 
-// AttachResolverKit should be called once a resolved is successfully decoded
-// from its stored format. This struct delivers a generic tool kit that
+// AttachConfig should be called once a resolved is successfully decoded from
+// its stored format. This struct delivers the configuration items that
 // resolvers need to complete their duty.
 //
 // NOTE: Part of the ContractResolver interface.
-func (h *htlcTimeoutResolver) AttachResolverKit(r ResolverKit) {
-	h.ResolverKit = r
+func (h *htlcTimeoutResolver) AttachConfig(r ResolverConfig) {
+	h.contractResolverKit = *newContractResolverKit(r)
 }
 
 // A compile time assertion to ensure htlcTimeoutResolver meets the