add how to ... to the headlines

Might be good for the search engines later

content/u/blog/how-to-enable-ipv6-in-applications/contents.lr

@@ -15,7 +15,7 @@ body:
 In this blog article you'll find some hints on how to enable IPv6 for
 various applications.
 
-## nginx
+## How to enable IPv6 in nginx
 
 The web server [nginx](https://nginx.org/) by default only listens to IPv4 if you use
 the standard `listen *:80;` directive. To enable IPv6, use
@@ -34,7 +34,7 @@ server {
 
 ```
 
-## haproxy
+## How to enable IPv6 in HAProxy
 
 There are various interesting configuration options in
 [HAProxy](https://www.haproxy.org/) related
@@ -98,9 +98,10 @@ backend httpsipv6
     server twitter.com ipv4@twitter.com
 ```
 
-## Lektor
+## How to enable IPv6 in Lektor
 
-The static CMS lektor by default serves on IPv4. To serve on IPv6
+The static CMS [lektor](https://www.getlektor.com/)
+by default serves on IPv4. To serve on IPv6
 localhost use `-h ::1`, to be globally reachable use `-h ::`.
 
 ```