[Harbour] Are there MT issues in contrib/hbpgsql?

[Viktor Szakáts]

>> Add Harbour wrapper to function which returns thread safe status
>> and check it. And of course check if you are using new separate
>> concatenation in each thread in your own code.
> 
> Ok, I'll check it.
> 
>> BTW someone should update contrib/hbpgsql/postgres.c to use
>> GC pointers for PGcancel* and PGresult* like for PGconn* and
>> add RTE when wrong parameters are passed to functions.
> 
> I'll try to do it.

Ops, I've already started it.

Brgds,
Viktor