User unregistration request. Use this carefully - this request completely removes 
your uin from server. You should provide password for this uin. 
ICQ server should ack this request using 
SNAC(15,03)/07DA/00B4.
  
|  00 15 | 
  | 
word | 
  | 
SNAC family | 
 
|  00 02 | 
  | 
word | 
  | 
SNAC subtype | 
 
|  00 00 | 
  | 
word | 
  | 
SNAC flags | 
 
|  xx xx xx xx | 
  | 
dword | 
  | 
SNAC request-id | 
 
 
 |  
 |  
|   | 
|  00 01 | 
  | 
word | 
  | 
TLV.Type(1) - encapsulated META_DATA | 
 
|  xx xx | 
  | 
word | 
  | 
TLV.Length | 
 
 
 |  
 |  
|   | 
|  xx xx | 
  | 
word (LE) | 
  | 
data chunk size (TLV.Length-2) | 
 
|  xx xx xx xx | 
  | 
dword (LE) | 
  | 
request owner uin | 
 
|  D0 07 | 
  | 
word (LE) | 
  | 
data type: META_DATA_REQ | 
 
|  02 00 | 
  | 
word (LE) | 
  | 
request sequence number | 
 
|  C4 04 | 
  | 
word (LE) | 
  | 
data subtype: META_UNREGISTER_USER | 
 
 
 |  
|  xx xx xx xx | 
  | 
dword (LE) | 
  | 
uin to unregister | 
 
|  xx xx | 
  | 
word (LE) | 
  | 
password string length | 
 
|  xx .. xx 00 | 
  | 
asciiz | 
  | 
password string | 
 
 
 |  
 
 |   
 |   | 
 
|   |  
 
 |  
 
 |   
 |   | 
 
|   |  
 
 |   
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