This is a list of the #define REFCLK_* stuff.

If you want to add a new refclock let us know and we'll assign you a number.

Should this list also include the name of the party responsible for the
refclock?

LOCALCLOCK	1	/* external (e.g., lockclock) */
GPS_TRAK	2	/* TRAK 8810 GPS Receiver */
WWV_PST		3	/* PST/Traconex 1020 WWV/H */
SPECTRACOM	4	/* Spectracom (generic) Receivers */
TRUETIME	5	/* TrueTime (generic) Receivers */
IRIG_AUDIO	6	/* IRIG-B/W audio decoder */
CHU_AUDIO	7	/* CHU audio demodulator/decoder */
PARSE		8	/* generic driver (usually DCF77,GPS,MSF) */
GPS_MX4200	9	/* Magnavox MX4200 GPS */
GPS_AS2201	10	/* Austron 2201A GPS */
GPS_ARBITER	11	/* Arbiter 1088A/B/ GPS */
IRIG_TPRO	12	/* KSI/Odetics TPRO-S IRIG */
ATOM_LEITCH	13	/* Leitch CSD 5300 Master Clock */
MSF_EES		14	/* EES M201 MSF Receiver */
GPSTM_TRUE	15	/* OLD TrueTime GPS/TM-TMD Receiver */
IRIG_BANCOMM	16	/* Bancomm GPS/IRIG Interface */
GPS_DATUM	17	/* Datum Programmable Time System */
NIST_ACTS	18	/* NIST Auto Computer Time Service */
WWV_HEATH	19	/* Heath GC1000 WWV/WWVH Receiver */
GPS_NMEA	20	/* NMEA based GPS clock */
GPS_VME		21	/* TrueTime GPS-VME Interface */
ATOM_PPS	22	/* 1-PPS Clock Discipline */
PTB_ACTS	NIST_ACTS
USNO		NIST_ACTS
GPS_HP		26	/* HP 58503A Time/Frequency Receiver */
ARCRON_MSF	27	/* ARCRON MSF radio clock. */
SHM		28	/* clock attached thru shared memory */
PALISADE	29	/* Trimble Navigation Palisade GPS */
ONCORE		30	/* Motorola UT Oncore GPS */
GPS_JUPITER	31	/* Rockwell Jupiter GPS receiver */
CHRONOLOG	32	/* Chrono-log K WWVB receiver */
DUMBCLOCK	33	/* Dumb localtime clock */
ULINK		34	/* Ultralink M320 WWVB receiver */
PCF		35	/* Conrad parallel port radio clock */
WWV_AUDIO	36	/* WWV/H audio demodulator/decoder */
FG		37	/* Forum Graphic GPS */
HOPF_SERIAL	38	/* hopf DCF77/GPS serial line receiver */
HOPF_PCI	39	/* hopf DCF77/GPS PCI receiver */
JJY		40	/* JJY receiver */
TT560		41	/* TrueTime 560 IRIG-B decoder */
ZYFER		42	/* Zyfer GPStarplus receiver */
RIPENCC		43	/* RIPE NCC Trimble driver */
???????		44	Claas Hilbrecht (20020711)