FAQ corrections etc.

attached as patch. It contains some minor corrections / clarifications. Note:

* store.pgsql.com (sec. 1.15) does not work, although it is linked from
http://www.pgsql.com/ - is it dead, or just resting?

* I've taken the liberty of removing this section:
"There is an interesting Web page comparing PostgreSQL to
MySQL at <A href="http://openacs.org/philosophy/why-not-mysql.html">
http://openacs.org/philosophy/why-not-mysql.html</A> Also, MySQL is
is a company that distributes its products via open source, and requires
a commercial license for close-source software, not an
open source development community like PostgreSQL."

as the page linked to is hopelessly outdated (May 2000) and the
reference to the license model is IMHO not directly relevant to
the context (performance).

Ian Barwick