Fixed CWE-476 in reading tag from MongoDB.
Fixed CWE-398 (useless code).
Fixed CWE-398 (useless code).
Fixed CWE-398 in client code (useless code).
Fixed CWE-398 in client code (useless code).
Fixed CWE-366 in hashed linked list.
Right fix of previous bug.
Fixed minor bug CWE-667 in hashed linked list.
Fixed minor bug CWE-476 in tag group subscribing.
Fixed minor bug CWE-561 in resend mechanism.
Fixed minor bug CWE-561 in example of client.
Fixed minor bug CWE-398 in negotiation of compression.