Change plugin to addon

change the use of plugin to addon where appropriate.

src/App.php

@@ -56,8 +56,8 @@ class App
 	public $hooks;
 	public $timezone;
 	public $interactive = true;
-	public $plugins;
-	public $plugins_admin = [];
+	public $addons;
+	public $addons_admin = [];
 	public $apps = [];
 	public $identities;
 	public $is_mobile = false;

src/Model/GContact.php

@@ -969,7 +969,7 @@ class GContact
 	/**
 	 * @brief Fetches users of given GNU Social server
 	 *
-	 * If the "Statistics" plugin is enabled (See http://gstools.org/ for details) we query user data with this.
+	 * If the "Statistics" addon is enabled (See http://gstools.org/ for details) we query user data with this.
 	 *
 	 * @param string $server Server address
 	 * @return void

src/Model/User.php

@@ -390,7 +390,7 @@ class User
 			$photo = avatar_img($email);
 		}
 
-		// unless there is no avatar-plugin loaded
+		// unless there is no avatar-addon loaded
 		if (strlen($photo)) {
 			$photo_failure = false;
 

src/Module/Login.php

@@ -89,9 +89,9 @@ class Login extends BaseModule
 			];
 
 			/*
-			 * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
-			 * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
-			 * and later plugins should not interfere with an earlier one that succeeded.
+			 * An addon indicates successful login by setting 'authenticated' to non-zero value and returning a user record
+			 * Addons should never set 'authenticated' except to indicate success - as hooks may be chained
+			 * and later addons should not interfere with an earlier one that succeeded.
 			 */
 			Addon::callHooks('authenticate', $addon_auth);
 

src/Object/Post.php

@@ -759,10 +759,10 @@ class Post extends BaseObject
 			$qc = $qcomment = null;
 
 			/*
-			 * Hmmm, code depending on the presence of a particular plugin?
+			 * Hmmm, code depending on the presence of a particular addon?
 			 * This should be better if done by a hook
 			 */
-			if (in_array('qcomment', $a->plugins)) {
+			if (in_array('qcomment', $a->addons)) {
 				$qc = ((local_user()) ? PConfig::get(local_user(), 'qcomment', 'words') : null);
 				$qcomment = (($qc) ? explode("\n", $qc) : null);
 			}