blog: enable doctoc in 4 posts that seemed to benefit from it

blog/_posts/2015-06-22-ipv6.md

@@ -16,6 +16,25 @@ clear it a little._
 I am writing this post, because [TorrentFreak wrote about buggy µTorrent and suggests disabling IPv6 because of it.](https://torrentfreak.com/popular-torrents-being-sabotaged-by-ipv6-peer-flood-150619/)
 The comments of that post are also totally lost.
 
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+
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [IPv4](#ipv4)
+- [IPv6](#ipv6)
+  - [EUI-64-addresses](#eui-64-addresses)
+    - [Windows IPv6 address randomization](#windows-ipv6-address-randomization)
+      - [Disabling privacy extensions](#disabling-privacy-extensions)
+  - [Getting IPv6](#getting-ipv6)
+- [Further reading](#further-reading)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
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+
 ## IPv4
 
 It's probably best to start with what is wrong with IPv4 and note that all

blog/_posts/2015-12-25-asus-tunnelbroker-net.md

@@ -10,6 +10,24 @@ redirect_from: /english/2015/12/25/asus-tunnelbroker-net.html
 _I am typing this, because there is a lot of misinformation on this,
 especially about the dynamic DNS part._
 
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+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [The tunnel](#the-tunnel)
+  - [Basic Config](#basic-config)
+  - [IPv6 LAN Setting](#ipv6-lan-setting)
+  - [IPv6 DNS Setting](#ipv6-dns-setting)
+  - [Auto Configuration Setting](#auto-configuration-setting)
+- [Dynamic DNS](#dynamic-dns)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
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+
 ## The tunnel
 
 Go to the router web panel and IPv6 under advanced settings.

blog/_posts/2016-03-09-weechat-tmux-quickstart.md

@@ -10,6 +10,24 @@ redirect_from: /english/2016/03/09/weechat-tmux-quickstart.html
 _Sometimes you don't have GUI when you need remote support, luckily you
 don't need it even if you have only one device._
 
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+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [What is what?](#what-is-what)
+- [Installing things](#installing-things)
+- [tmux](#tmux)
+- [WeeChat](#weechat)
+- [pastebinit](#pastebinit)
+- [Further reading](#further-reading)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
+<!-- editorconfig-checker-enable -->
+
 ## What is what?
 
 - Tmux is terminal multiplexer which allows you to have "multiple

blog/_posts/2019-07-11-android-private-dns-in-practice.md

@@ -14,7 +14,22 @@ when the port is blocked or there is a captive portal. I didn't find this
 information anywhere and now that I have gotten the Android 9 Go update on
 my Nokia 1, I am able to type my own blog post about it._
 
-Notes/disclaimers:
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+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [Notes/disclaimers:](#notesdisclaimers)
+- [The tests](#the-tests)
+- [Why I use Quad9?](#why-i-use-quad9)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
+<!-- editorconfig-checker-enable -->
+
+## Notes/disclaimers:
 
 - Phone: Nokia 1 (TA-1047) running Android 9 (Go Edition)
   - I think I got the update on 9th of July
@@ -37,6 +52,8 @@ Notes/disclaimers:
   DoT server.
 - [My messy notes for making this post](https://github.com/Mikaela/mikaela.github.io/issues/149)
 
+## The tests
+
 ---
 
 Test: _automatic mode without DoT capable server from DHCP_; the setting