Accessor for the client non-proxy hosts list. If a request hostname matches any of the hostname or partial domain name strings in this non-proxy hosts list then the proxy will not be used for the request. Each element of the list may be either a hostname string, or a partial domain name string preceeded by a period. For example ".scieneer.com" matches all hostnames with this suffix, whereas "www.scieneer.com" matches only a matching hostname. The comparison is case insensitive, and a trailing period is ignored.