Update to FAQ

I have update the first section of the FAQ:

http://www.postgresql.org/docs/faqs.FAQ.html

In particular:

o reordered items to be more logical
o added clarification of license
o added section about bug reporting replies
o added section of feature requests

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
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