VOL-4337: Code upgrade for 3/2020 G.988 support and remaining Extended Message Set support

Change-Id: I6c5e1a167216ad9b51e9da89460e9909465ae1bc
diff --git a/generated/uni-g.go b/generated/uni-g.go
index 58d8f6a..e7485fe 100644
--- a/generated/uni-g.go
+++ b/generated/uni-g.go
@@ -27,11 +27,11 @@
 
 // UniGClassID is the 16-bit ID for the OMCI
 // Managed entity UNI-G
-const UniGClassID ClassID = ClassID(264)
+const UniGClassID = ClassID(264) // 0x0108
 
 var unigBME *ManagedEntityDefinition
 
-// UniG (class ID #264)
+// UniG (Class ID: #264 / 0x0108)
 //	This ME organizes data associated with UNIs supported by GEM. One instance of the UNI-G ME
 //	exists for each UNI supported by the ONU.
 //
@@ -43,19 +43,35 @@
 //
 //	Attributes
 //		Managed Entity Id
-//			Managed entity ID: This attribute uniquely identifies each instance of this ME. Through an
-//			identical ID, this ME is implicitly linked to an instance of a PPTP. (R) (mandatory) (2-bytes)
+//			This attribute uniquely identifies each instance of this ME. Through an identical ID, this ME is
+//			implicitly linked to an instance of a PPTP. (R) (mandatory) (2-bytes)
 //
 //		Deprecated
-//			Deprecated:	This attribute is not used. It should be set to 0 by the OLT and ignored by the ONU.
-//			(R,-W) (mandatory) (2-bytes)
+//			This attribute is not used. It should be set to 0 by the OLT and ignored by the ONU. (R,-W)
+//			(mandatory) (2-bytes)
 //
 //		Administrative State
+//			This attribute locks (1) and unlocks (0) the functions performed by this ME. Administrative
+//			state is further described in clause A.1.6. (R,-W) (mandatory) (1-byte)
+//
 //			NOTE - PPTP MEs also have an administrative state attribute. The user port is unlocked only if
 //			both administrative state attributes are set to unlocked. It is recommended that this attribute
 //			not be used: that the OLT set it to 0 and that the ONU ignore it.
 //
 //		Management Capability
+//			An ONU may support the ability for some or all of its PPTPs to be managed either directly by the
+//			OMCI or from a non-OMCI management environment such as [BBF TR-069]. This attribute advertises
+//			the ONU's capabilities for each PPTP.
+//
+//			This attribute is an enumeration with the following code points:
+//
+//			0	OMCI only
+//
+//			1	Non-OMCI only. In this case, the PPTP may be visible to the OMCI, but only in a read-only
+//			sense, e.g., for PM collection.
+//
+//			2	Both OMCI and non-OMCI
+//
 //			(R) (optional) (1-byte)
 //
 //		Non_Omci Management Identifier
@@ -65,8 +81,68 @@
 //			links to a non-OMCI management environment. (R,-W) (optional) (2-bytes)
 //
 //		Relay Agent Options
+//			%SL	In TR-101, this is called a slot. In an ONU, this variable refers to a shelf. It is
+//			meaningful if the ONU has multiple shelves internally or is daisy-chained to multiple equipment
+//			modules. The range of this variable is "0".. "99"
+//
+//			%SU	In TR-101, this is called a sub-slot. In fact, it represents a cardholder. The range of this
+//			variable is "0".. "99"
+//
+//			%PO	UNI port number. The range of this variable is "0".. "999"
+//
+//			%AE	ATM or Ethernet. This variable can take on the values "atm" or "eth".
+//
+//			%SV	S-VID for Ethernet UNI, or ATM VPI for ATM UNI, as it exists on the DHCP request received
+//			upstream across the UNI. Range "0".. "4096" for S-VID; range "0".. "255" for VPI. The value
+//			"4096" indicates no S-VID tag.
+//
+//			%CV	C-VID (Q-VID) for Ethernet UNI or ATM VCI for ATM UNI, as it exists on the DHCP request
+//			received upstream across the UNI. Range "0".. "4096" for C-VID; range "0".."65535" for VCI. The
+//			value "4096" indicates no C-VID tag.
+//
+//			Spaces in the provisioned string are significant.
+//
+//			Example: if the large string were provisioned with the value
+//
+//			%01%SL/%SU/%PO:%AE/%SV.%CV<null>,
+//
+//			then the ONU would generate the following DHCP option 82 agent circuitID string for an Ethernet
+//			UNI that sent a DHCP request with no S tag and C tag = 3210 on shelf 2, slot 3, port 4.
+//
+//			2/3/4:eth/4096.3210
+//
+//			With the same provisioning, the ONU would generate the following DHCP option 82 agent circuit-ID
+//			string for an ATM UNI that sent a DHCP request on VPI = 123 and VCI = 4567 on shelf 2, slot 3,
+//			port 4.
+//
 //			2/3/4:atm/123.4567
 //
+//			This attribute is a pointer to a large string ME whose content specifies one or more DHCP relay
+//			agent options. (R, W) (optional) (2-bytes)
+//
+//			The contents of the large string are parsed by the ONU and converted into text strings. Variable
+//			substitution is based on defined three-character groups, each of which begins with the '%'
+//			character. The string '%%' is an escape mechanism whose output is a single '%' character. When
+//			the ONU cannot perform variable substitution on a substring of the large string, it generates
+//			the specified option as an exact quotation of the provisioned substring value.
+//
+//			Provisioning of the large string is separate from the operation of setting the pointer in this
+//			attribute. It is the responsibility of the OLT to ensure that the large string contents are
+//			correct and meaningful.
+//
+//			Three-character variable definitions are as follows. The first variable in the large string must
+//			specify one of the option types. Both options for a given IP version may be present if desired,
+//			each introduced by its option identifier. Terminology is taken from clause 3.9.3 of [b-BBF
+//			TR-101].
+//
+//			%01, %18 Specifies that the following string is for option 82 sub-option 1, agent circuit-ID
+//			(IPv4) or option 18, interface-ID (IPv6). The equivalence permits the same large string to be
+//			used in both IP environments.
+//
+//			%02, %37 Specifies that the following string is for option 82 sub-option 2, relay agent remote-
+//			ID (IPv4) or option 37, relay agent remoteID (IPv6). The equivalence permits the same large
+//			string to be used in both IP environments.
+//
 type UniG struct {
 	ManagedEntityDefinition
 	Attributes AttributeValueMap