Unplug before sending close() message, to avoid screwing up interfaces

which respond to close with a reopen() (e.g. iSCSI).

src/core/job.c

 void job_done ( struct job_interface *job, int rc ) {
 	struct job_interface *dest = job_get_dest ( job );
 
-	dest->op->done ( dest, rc );
 	job_unplug ( job );
+	dest->op->done ( dest, rc );
 	job_put ( dest );
 }
 
 void job_kill ( struct job_interface *job ) {
 	struct job_interface *dest = job_get_dest ( job );
 
-	dest->op->kill ( dest );
 	job_unplug ( job );
+	dest->op->kill ( dest );
 	job_put ( dest );
 }
 

src/core/resolv.c

 		   int rc ) {
 	struct resolv_interface *dest = resolv_get_dest ( resolv );
 
-	dest->op->done ( dest, sa, rc );
 	resolv_unplug ( resolv );
+	dest->op->done ( dest, sa, rc );
 	resolv_put ( dest );
 }
 

src/core/xfer.c

 
 	DBGC ( xfer, "XFER %p->%p close\n", xfer, dest );
 
-	dest->op->close ( dest, rc );
 	xfer_unplug ( xfer );
+	dest->op->close ( dest, rc );
 	xfer_put ( dest );
 }