update options.htm

Related to #28

src/pages/options.htm

@@ -21,7 +21,7 @@
 			</div>
 			<hr>
 			<div>
-				Every time that you navigate to a site that loads successfully over HTTPS, HTTPZ remembers its hostname, so as to avoid redirecting it to HTTP if it ever fails in the future. This minimizes the risk of a <abbr title="Man in the Middle">MitM</abbr> being able to exploit the extension's behavior. Note that this is only meaningful in automatic mode.
+				Every time that you navigate to a site that loads successfully over HTTPS, HTTPZ remembers its hostname, so as to avoid redirecting it to HTTP if it ever fails in the future. This minimizes the risk of a <abbr title="Man in the Middle">MitM</abbr> being able to exploit the extension's behavior. Do not disable this unless you know what you are doing.
 				<div class="browser-style fb">
 					<input id="rememberSecureSites" type="checkbox"><label for="rememberSecureSites">
 						Remember Secure Sites