[libravatar] Add addon config

- Update mentions of .htconfig.php

libravatar/README.md

@@ -9,8 +9,6 @@ This addon allows you to look up an avatar image for new users and contacts at [
 Libravatar is a free and open replacement for Gravatar. It is a service where people can store an avatar image for their email-addresses. These avatar images can get looked up for example in comment functions, profile pages, etc. on other sites. There exists a central installation at [www.libravatar.com](http://www.libravatar.com), but you can also host it on your own server. If no avatar was found Libravatar will look up at Gravatar as a fallback.
 There is no rating available, as it is on Gravatar, so all avatar lookups are g-rated. (Suitable for all audiences.)
 
-PHP >= 5.3 is required for this addon!
-
 You can not use the Libravatar and Gravatar addon at the same time. You need to choose one. If you need other ratings than g you better stay with Gravatar, otherwise it is safe to use Libravatar, because it will fall back to Gravatar if nothing was found at Libravatar.
 
 * * *
@@ -28,12 +26,14 @@ If no avatar was found for an email Libravatar can create some pseudo-random gen
 See examples at [Libravatar][1].
 
 ## Alternative Configuration
-Open the .htconfig.php file and add "libravatar" to the list of activated addons:
+Open the config/local.ini.php file and add "libravatar" to the list of activated addons:
 
-        $a->config['system']['addon'] = "..., libravatar";
+        [system]
+		addon = ...,libravatar
 
-You can add one configuration variable for the addon:
+You can add one configuration variables for the addon:
 
-        $a->config['libravatar']['default_avatar'] = "identicon";
+        [libravatar]
+		default_avatar = identicon
 
 [1]: http://wiki.libravatar.org/api/ "See API documentation at Libravatar for more information"