From the control spec... ``` 761 3.11. SETCIRCUITPURPOSE 762 763 Sent from the client to the server. The format is: 764 "SETCIRCUITPURPOSE" SP CircuitID SP Purpose CRLF 765 766 This changes the circuit's purpose. See EXTENDCIRCUIT above for details. ``` And from 'EXTENDCIRCUIT above'... ``` 3.10. EXTENDCIRCUIT 736 737 Sent from the client to the server. The format is: 738 "EXTENDCIRCUIT" SP CircuitID 739 [SP ServerSpec *("," ServerSpec)] 740 [SP "purpose=" Purpose] CRLF ``` This seems to imply that "SETCIRCUITPURPOSE 4 controller" is valid, but, it isn't, "SETCIRCUITPURPOSE 4 purpose=controller" is. ``` 764 "SETCIRCUITPURPOSE" SP CircuitID SP Purpose CRLF ``` should be... ``` 764 "SETCIRCUITPURPOSE" SP CircuitID SP "purpose=" Purpose CRLF ``` I'm attaching a git formatted patch which makes this modification.