remove + fix dead links

readme.md

@@ -484,7 +484,6 @@ ltConfig is a plugin for Deluge that allows direct modification to libtorrent se
 - [QuickPar](http://www.quickpar.org.uk/index.htm) Tool for reconstructing damaged/missing/corrupt Usenet binaries
 
 ### Usenet Providers
-- [Usenet Services Map](https://commons.wikimedia.org/wiki/File:Usenet_Services_MindMap.svg) Mindmap by /u/thepageunit
 - [Usenet Providers and Backbones](https://upload.wikimedia.org/wikipedia/commons/7/7d/Usenet_Providers_and_Backbones.svg) This is a simple overview of the current companies, backbones, providers and resellers in the Usenet landscape.
 - [A Quick Guide to Choosing a Usenet Provider](https://www.reddit.com/r/usenet/comments/a7ffm7/a_quick_guide_to_choosing_a_usenet_provider/) Reddit post by /u/FlickFreak
 - [Eweka](https://www.eweka.nl/) Netherlands-based Usenet provider
@@ -507,7 +506,7 @@ ltConfig is a plugin for Deluge that allows direct modification to libtorrent se
 - [NZBFinder](https://nzbfinder.ws/) Usenet indexer and newznab API with a clean UI and 8+ year backlog of NZBs
 - [DrunkenSlug](https://drunkenslug.com/) :star2: Popular NZB indexer with a free tier and decent retention
 - [NZBCat](https://nzb.cat/) Meow *cough* nzb-hair-bal
-- [DOGnzb](https://dognzb.cr/) Invite-only NZB site (although they do have a [registration page](https://dognzb.cr/register) at the moment)
+- [DOGnzb](https://dognzb.cr/login) Invite-only NZB site (although they do have a [registration page](https://dognzb.cr/register) at the moment)
 - [omgwtfnzbs](https://omgwtfnzbs.me/login) Invite-only NZB indexer with a funny name
 
 #### Free Indexers