build_path_query

# File lib/uri/ldap.rb, line 145
    def build_path_query
      @path = '/' + @dn

      query = []
      [@extensions, @filter, @scope, @attributes].each do |x|
        next if !x && query.size == 0
        query.unshift(x)
      end
      @query = query.join('?')
    end