Improve documentation of visitor-related functions

boot.php

@@ -266,7 +266,7 @@ function public_contact()
 }
 
 /**
- * Returns contact id of authenticated site visitor or false
+ * Returns public contact id of authenticated site visitor or false
  *
  * @return int|bool visitor_id or false
  */

src/Core/Session.php

@@ -65,10 +65,10 @@ class Session
 	}
 
 	/**
-	 * Returns contact ID for given user ID
+	 * Return the user contact ID of a visitor for the given user ID they are visiting
 	 *
 	 * @param integer $uid User ID
-	 * @return integer Contact ID of visitor for given user ID
+	 * @return integer
 	 */
 	public static function getRemoteContactID($uid)
 	{