replace rbl.efnet.org with rbl.efnetrbl.org

rbl.efnet.org redirects to rbl.efnetrbl.org and says
"Notice We have created a mirror of the rbl.efnet.org zone at rbl.efnetrbl.org.
It has the exact same data and responses. Please use the mirror in your configs.
The mirror was created after repeated failures at Network Solutions."

Also deleted some random tabs on empty lines and some extra spaces which were put by error I guess

inc/config.php

@@ -199,11 +199,11 @@
 
 	// Prevents most Tor exit nodes from making posts. Recommended, as a lot of abuse comes from Tor because
 	// of the strong anonymity associated with it.
-	// Example: $config['dnsbl'][] = 'another.blacklist.net'; // 
+	// Example: $config['dnsbl'][] = 'another.blacklist.net';
 	// $config['dnsbl'][] = array('tor.dnsbl.sectoor.de', 1); //sectoor.de site is dead. the number stands for (an) ip adress(es) I guess. 
-	
+
 	// Replacement for sectoor.de
-	$config['dnsbl'][] = array('rbl.efnet.org', 4);
+	$config['dnsbl'][] = array('rbl.efnetrbl.org', 4);
 
 	// http://www.sorbs.net/using.shtml
 	// $config['dnsbl'][] = array('dnsbl.sorbs.net', array(2, 3, 4, 5, 6, 7, 8, 9));
@@ -225,7 +225,7 @@
 
 	// Skip checking certain IP addresses against blacklists (for troubleshooting or whatever)
 	$config['dnsbl_exceptions'][] = '127.0.0.1';
-	
+
 	// To prevent bump atacks; returns the thread to last position after the last post is deleted. 
 	$config['anti_bump_flood'] = false;
 
@@ -258,7 +258,7 @@
 
 	// How soon after regeneration do hashes expire (in seconds)?
 	$config['spam']['hidden_inputs_expire'] = 60 * 60 * 3; // three hours
-	
+
 	// Whether to use Unicode characters in hidden input names and values.
 	$config['spam']['unicode'] = true;
 
@@ -313,7 +313,7 @@
 
 	// Enable Custom Captcha you need to change a couple of settings 
 	//Read more at: /inc/captcha/readme.md
-	 $config['captcha'] = array();
+	$config['captcha'] = array();
 
 	// Enable custom captcha provider
 	$config['captcha']['enabled'] = false;
@@ -321,7 +321,7 @@
 	//New thread captcha
  	//Require solving a captcha to post a thread. 
  	//Default off.
- 	 $config['new_thread_capt'] = false;
+ 	$config['new_thread_capt'] = false;
 
 	// Custom captcha get provider path (if not working get the absolute path aka your url.)
 	$config['captcha']['provider_get'] = '../inc/captcha/entrypoint.php';
@@ -329,7 +329,7 @@
 	$config['captcha']['provider_check'] = '../inc/captcha/entrypoint.php';
 
 	// Custom captcha extra field (eg. charset)
-	 $config['captcha']['extra'] = 'abcdefghijklmnopqrstuvwxyz';
+	$config['captcha']['extra'] = 'abcdefghijklmnopqrstuvwxyz';
 	
 	// Ability to lock a board for normal users and still allow mods to post.  Could also be useful for making an archive board
 	$config['board_locked'] = false;
@@ -613,7 +613,7 @@
 	// that you will have to disable BOTH country_flags and contry_flags_condensed optimization (at least on a board
 	// where they are enabled).
 	$config['user_flag'] = false;
-	
+
 	// List of user_flag the user can choose. Flags must be placed in the directory set by $config['uri_flags']
 	$config['user_flags'] = array();
 	/* example: 
@@ -630,7 +630,7 @@
 
 	// Use semantic URLs for threads, like /b/res/12345/daily-programming-thread.html
 	$config['slugify'] = false;
-	
+
 	// Max size for slugs
 	$config['slug_max_size'] = 80;