The 'match_path' string variable allows you to restrict your search based
 on pathname components. For example, if you are only looking for DOS PC
 programs and think that site administrators may have put such files in
 directories with names like "PC", "DOS" or "IBM" then you could set the
 match_path variable as:

 	set match_path PC:DOS:IBM

 All files returned must have one or more of these components in its
 pathname (the list of directories leading to the file or directory).

 The general syntax is:

 	set match_path <component>[[':'<component>]...]

 Note that the component names are always matched on a case-insensitive
 basis. Also, there is an implicit logical OR between components: in the
 example above the system matches it as "PC or DOS or IBM" so that if any
 one of the components match, then the condition is satisfied.