update read me with issue tracker

README.md

@@ -6,6 +6,10 @@ A Gemini protocol browser for Android based OS. Formerly called Två, and briefl
 
 See the project page on Öppenlab.net for latest download: [oppenlab.net/pr/ariane](https://oppenlab.net/pr/ariane/)
 
+## Issue tracker
+
+[todo.sr.ht/~oppen/ariane](https://todo.sr.ht/~oppen/ariane)
+
 ## Contact and Mailing Lists
 
 Email direct to `ariane@fastmail.se` or join a mailing list
@@ -15,7 +19,7 @@ Email direct to `ariane@fastmail.se` or join a mailing list
 * [https://lists.sr.ht/~oppen/ariane-discuss](https://lists.sr.ht/~oppen/ariane-discuss) - general queries, suggestions, chat
 * [https://lists.sr.ht/~oppen/ariane-devel](https://lists.sr.ht/~oppen/ariane-devel) - for develop discussion and to submit patches
 
-## TLS
+# TLS
 
 From the [Gemini specification](https://gemini.circumlunar.space/docs/specification.html):
 
@@ -26,7 +30,7 @@ Ariane uses TLS but does not implement TOFU at all:
 
 > Clients can validate TLS connections however they like (including not at all) but the strongly RECOMMENDED approach is to implement a lightweight "TOFU" certificate-pinning system which treats self-signed certificates as first- class citizens
 
-### Client TLS
+## Client TLS
 
 > Although rarely seen on the web, TLS permits clients to identify themselves to servers using certificates
 
@@ -62,7 +66,7 @@ Not implemented yet.
 Display a servers certs with: 
 `openssl s_client -showcerts -connect gus.guru:1965`
 
-### Android API
+## Android API
 
 * [SSLSocket](https://developer.android.com/reference/javax/net/ssl/SSLSocket)
 * [Android keystore system](https://developer.android.com/training/articles/keystore.html)