Update examples/udhcp/udhcpd.conf

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/examples/udhcp/udhcpd.conf b/examples/udhcp/udhcpd.conf
index 90714bc..bb8774e 100644
--- a/examples/udhcp/udhcpd.conf
+++ b/examples/udhcp/udhcpd.conf
@@ -74,43 +74,49 @@
 option	0x08	01020304	# option 8: "cookie server IP addr: 1.2.3.4"
 option	14	"dumpfile"
 
-# Currently supported options (for more info, see options.c):
-#opt lease      NUM
-#opt subnet     IP
-#opt broadcast  IP
-#opt router     IP_LIST
-#opt ipttl      NUM
-#opt mtu        NUM
-#opt hostname   STRING		# client's hostname
-#opt domain     STRING		# client's domain suffix
-#opt search     STRING_LIST	# search domains
-#opt nisdomain  STRING
-#opt timezone   NUM		# (localtime - UTC_time) in seconds. signed
-#opt tftp       STRING		# tftp server name
-#opt bootfile   STRING		# tftp file to download (e.g. kernel image)
-#opt bootsize   NUM		# size of that file
-#opt rootpath   STRING		# (NFS) path to mount as root fs
-#opt wpad       STRING
-#opt serverid   IP		# default: server's IP
-#opt message    STRING		# error message (udhcpd sends it on success too)
-#opt vlanid     NUM		# 802.1P VLAN ID
-#opt vlanpriority NUM		# 802.1Q VLAN priority
+# Currently supported options [hex option value] (for more info, see options.c):
+#opt lease      NUM             # [0x33]
+#opt subnet     IP              # [0x01]
+#opt broadcast  IP              # [0x1c]
+#opt router     IP_LIST         # [0x03]
+#opt ipttl      NUM             # [0x17]
+#opt mtu        NUM             # [0x1a]
+#opt hostname   STRING          # [0x0c] client's hostname
+#opt domain     STRING          # [0x0f] client's domain suffix
+#opt search     STRING_LIST     # [0x77] search domains
+#opt nisdomain  STRING          # [0x28]
+#opt timezone   NUM             # [0x02] (localtime - UTC_time) in seconds. signed
+#opt tftp       STRING          # [0x42] tftp server name
+#opt bootfile   STRING          # [0x43] tftp file to download (e.g. kernel image)
+#opt bootsize   NUM             # [0x0d] size of that file
+#opt rootpath   STRING          # [0x11] (NFS) path to mount as root fs
+#opt wpad       STRING          # [0xfc] Web Proxy Auto Discovery Protocol
+#opt serverid   IP              # [0x36] default: server's IP
+#opt message    STRING          # [0x38] error message (udhcpd sends it on success too)
+#opt vlanid     NUM             # [0x84] 802.1P VLAN ID
+#opt vlanpriority NUM           # [0x85] 802.1Q VLAN priority
+# RFC 5071: PXELINUX Options
+#opt 0xd0       F100747E        # [0xd0] magic
+#opt pxeconffile STRING         # [0xd1]
+#opt pxepathprefix STRING       # [0xd2]
+#opt reboottime NUM             # [0xd3] bootstrap timeout
 # Options specifying server(s)
-#opt dns        IP_LIST
-#opt wins       IP_LIST
-#opt nissrv     IP_LIST
-#opt ntpsrv     IP_LIST
-#opt lprsrv     IP_LIST
-#opt swapsrv    IP
+#opt dns        IP_LIST         # [0x06]
+#opt wins       IP_LIST         # [0x2c]
+#opt nissrv     IP_LIST         # [0x29]
+#opt ntpsrv     IP_LIST         # [0x2a]
+#opt lprsrv     IP_LIST         # [0x09]
+#opt swapsrv    IP              # [0x10]
 # Options specifying routes
-#opt routes     IP_PAIR_LIST
-#opt staticroutes   STATIC_ROUTES # RFC 3442 classless static route option
-#opt msstaticroutes STATIC_ROUTES # same, using MS option number
+#opt routes     IP_PAIR_LIST    # [0x21]
+#opt staticroutes   STATIC_ROUTES # [0x79] RFC 3442 classless static route option
+#opt msstaticroutes STATIC_ROUTES # [0xf9] same, using MS option number
 # Obsolete options, no longer supported
-#opt logsrv     IP_LIST	# 704/UDP log server (not syslog!)
-#opt namesrv    IP_LIST	# IEN 116 name server, obsolete (August 1979!!!)
-#opt cookiesrv  IP_LIST	# RFC 865 "quote of the day" server, rarely (never?) used
-#opt timesrv    IP_LIST	# RFC 868 time server, rarely (never?) used
+#opt logsrv     IP_LIST # [0x07] 704/UDP log server (not syslog!)
+#opt namesrv    IP_LIST # [0x05] IEN 116 name server, obsolete (August 1979!!!)
+#opt cookiesrv  IP_LIST # [0x08] RFC 865 "quote of the day" server, rarely (never?) used
+#opt timesrv    IP_LIST # [0x04] RFC 868 time server, rarely (never?) used
 # TODO: in development
-#opt userclass  STRING		# RFC 3004. set of LASCII strings. "I am a printer" etc
-#opt sipserv    STRING LIST	# RFC 3361. flag byte, then: 0: domain names, 1: IP addrs
+#opt userclass  STRING          # [0x4d] RFC 3004. set of LASCII strings. "I am a printer" etc
+#opt sipsrv     STRING LIST     # [0x78] RFC 3361. flag byte, then: 0: domain names, 1: IP addrs
+#opt ip6rd ....                 # [0xd4] IPv6 rapid deployment