Re: BUG #15964: vacuumdb.c:187:10: error: use of undeclaredidentifier 'FD_SETSIZE'

On Wed, Aug 21, 2019 at 10:34:49AM -0400, Alvaro Herrera wrote:
> Ah, yes, that's right -- my system's open(3p) manpage says:
> 
>        The  open()  function  shall return a file descriptor for the named file
>        that is the lowest file descriptor not currently open for that process.

Ah, well.  In this case, what about that?
("too many jobs for this platform's select() -- try %d", i-1)

I don't think that it is a good idea to use the option name -j/--jobs
directly in the error string as scripts_parallel.c should not have any
knowledge of how the option layer is in the tools using its APIs.
Attached is an updated patch, with refined comments.
--
Michael