Обсуждение: pgcrypto doc polish

Few small things:

- Mention pgcrypto.sql
- Mention asciidoc.  To hint that occasional weird formatting
  is not random.
- Clarify few senctences.
- Remove anything related to MySQL password().  It was
  interesting to look at, but it should not be mentioned in
  serious conversation.  Also, they have replaced it in 4.1
  with SHA1, so the crap implementation is best forgotten.

--
marko

Marko Kreen <marko@l-t.ee> writes:
> Few small things:
> [ snip ]

Applied, thanks.

I also fixed a few small grammatical problems in the text.

            regards, tom lane