SilcBool silc_hash_table_add_ext(SilcHashTable ht, void *key,
                                     void *context,
                                     SilcHashFunction hash,
                                     void *hash_user_context);

    Adds new entry to the hash table. The `key' is hashed using the
    hash function and the both `key' and `context' will be saved to the
    hash table. This function quarantees that the entry is always added
    to the hash table reliably (it is collision resistant).

    The `hash' and `hash_user_context' are application specified hash
    function. If not provided the hash table's default is used.