Hi,

This is not a critical issue but a patch to port fof to postgresql using
pear::mdb2.

I am currently using this patch since several weeks and it works fine.
Using pear::mdb2 makes it easy to be used by other backends.

There are several points to be noticed:
 - the creation of the tables doesn't use pear::mdb2 and thus is not really
portable. Pear::mdb2 can handle that but I am not sure of the result
 - the detection of presence of pear::mdb2 in install.php is quite ugly.
Someone who knows php better than me can probably make it better
 - the vacuum/optimization of the database needs Pear::MDB2-1.5.0_beta1 or more