cleaned up a comment

 *

 * If ppValue is NULL, allocate space for the value and return it in

 * *pValue. The return value is the number of bytes in the value.

 * The first argument is the ap_pool_t to use to allocate space for the value.

 * The first argument is the pool to use to allocate space for the value.

 *

 * If pValue is not NULL, assume it is a buffer of nSizeValue bytes,

 * and write the value into the buffer. The return value is the number

 * of bytes in the value (so if the return value is greater than

 * the supplied nSizeValue, the caller knows that *pValue is truncated).

 * The ap_pool_t argument is ignored.

 * The pool argument is ignored.

 *

 * The return value is the number of bytes in the successfully retreived

 * key if everything worked, or: