This search facility performs a case-insensitive search using a number of
keywords. You don't need to put quotes around search words.
You can use the booleans (and, or, or not) in searching. Without these
booleans, the search will assume you're adding the words together.
Evaluation takes place from left to right only, although you can use
parentheses to force the order of evaluation.
You can also use wildcards (asterisks) to search for matches to the
beginnings of words only — you can't put asterisks at the front or in the
middle of words.
example 1: john and doe or jane
example 2: john and (doe or not jane)
example 3: not (john or jane) and doe
example 4: j* and doe
1. This search evaluates the expression from left to right.
2. The search will also be evaluated from left to right, although the
operation in parentheses will be evaluated as a whole first.
3. john or jane will be evaluated first, a not operation will be performed
on that, then everything will be anded with doe.
4. This will search for all files that contain words starting with the
letter j and that also contain doe.
