pgsql: Rewrite docs section about routine vacuuming --- it's gotten - Mailing list pgsql-committers

Log Message:
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Rewrite docs section about routine vacuuming --- it's gotten rather mangled of
late, with lots of redundancy, bad grammar, and just plain poor exposition.
Make it clear that autovacuum is now considered the normal solution.

Modified Files:
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    pgsql/doc/src/sgml:
        maintenance.sgml (r1.85 -> r1.86)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/maintenance.sgml?r1=1.85&r2=1.86)