Re: PL contribution guidelines?

Peter Eisentraut wrote:
> 
> mlg3 writes:
> 
> > I understand that pgsql uses autoconf but not other autotools.
> > The best location for such contribution is in
> > src/pl/pl<lang-name>
> >
> > Now, how do I include my PL into the build list?
> > What files must I provide? (preferrably, by borrowing
> > them from another PL, e.g. PLPERL or TCL])
> 
> There is currently some disagreement about whether every now procedural
> language implementation should be included in the core distribution.  If
> you choose to distribute your package separately, you can take a look at
> http://developer.postgresql.org/~petere/plsh.html as an example for how to
> package it.

1)
Is there a centralized list of pgsql PL's ?

2)
At that URL, I see:       pgplsh-1.0-7.3.tar.gz   17-Dec-2002 19:17   244k  GZIP compressed docume>
pgplsh-20010821.tar.gz 23-Sep-2002 18:08    99k  GZIP compressed docume>       pgplsh-20010914.tar.gz  23-Sep-2002
18:08  101k  GZIP compressed docume>       pgplsh-20011005.tar.gz  23-Sep-2002 18:08   102k  GZIP compressed docume>
 
which version should I prefer? What is the difference between them?