Re: Will PQregisterThreadLock() be documented?

Tom Lane wrote:
> Volkan YAZICI <volkan(dot)yazici(at)gmail(dot)com> writes:
> > Revision 1.269: Wed Mar 24 03:44:59 2004 UTC by momjian
> > Branches: MAIN
> > ] Add thread locking to SSL and Kerberos connections.
> > ]
> > ] I have removed the docs mentioning that SSL and Kerberos are not
> > ] thread-safe.
> > ]
> > ] Manfred Spraul
>
> I note that PQinitSSL is likewise documentation-free.
>
> Also, neither one of these two routines is listed in exports.txt,
> meaning that Windows users are physically unable to call them
> even if they knew they existed :-(

I have applied the following patch to document PQinitSSL() and
PQregisterThreadLock().

I also remove the crypt() mention in the libpq threading section and
added a single sentence in the client-auth manual page under crypt().
Crypt authentication is so old now that a separate paragraph about it
seemed unwise.

I also added a comment about our use of locking around pqGetpwuid().

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