Support 64 hex character wifi keys (#24)

mopidy_websettings/index.html

@@ -54,7 +54,8 @@ <h2>Network</h2>
             <label for="network__wifi_network">Wifi Network Name</label>
             <input type="text" name="network__wifi_network" value="{{ network__wifi_network }}" size="15" maxlength="40"/>
             <label for="network__wifi_password">Wifi Password</label>
-            <input type="password" name="network__wifi_password" value="{{ network__wifi_password }}" size="10" maxlength="63"/>
+            <p>Enter your passphrase or 64 character hex key.</p>
+            <input type="password" name="network__wifi_password" value="{{ network__wifi_password }}" size="8" maxlength="64"/>
             <label for="network__wifi_country">Wifi Country</label>
             <p>Optionally specify your <a href="https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Current_codes" target="_blank">country code</a>
             to ensure all available wifi channels are made enabled. For example: GB</p>