I've changed the lucene-based search to require all given terms to match
by default. This gives more focused results and is more consistent with
typical search engine practice, and our behavior under the old MySQL search.
You can still make terms optional by explicitly using the 'OR' operator
such as: "civil OR war", "blueberry OR pie". (Note that 'OR'
must be
capitalized.)
-- brion vibber (brion @
pobox.com)