Repair "Contents" links

Clarify site-specific changes
Add PowerDNS requirements

README.md

@@ -2,17 +2,17 @@
 Contents
 ========
 
- * [ Introduction                            ]  (#introduction)
- * [ Collecting and Summarizing Host Metrics ]  (#collecting-and-summarizing-host-metrics)
- * [ Answering DNS Queries                   ]  (#answering-dns-queries)
- * [ TTLs and MXes                           ]  (#ttls-and-mxes)
- * [ Configuring the poller                  ]  (#configuring-the-poller)
- * [ The Load-Balanced Client Daemon         ]  (#the-load-balanced-client-daemon)
- * [ Site-Specific Configuration             ]  (#site-specific-configuration)
- * [ Installation                            ]  (#installation)
- * [ PowerDNS Configuration                  ]  (#powerdns-configuration)
- * [ Starting the poller and PowerDNS        ]  (#starting-the-poller-and-powerdns)
- * [ Conclusion                              ]  (#conclusion)
+ * [ Introduction                            ](#introduction)
+ * [ Collecting and Summarizing Host Metrics ](#collecting-and-summarizing-host-metrics)
+ * [ Answering DNS Queries                   ](#answering-dns-queries)
+ * [ TTLs and MXes                           ](#ttls-and-mxes)
+ * [ Configuring the poller                  ](#configuring-the-poller)
+ * [ The Load-Balanced Client Daemon         ](#the-load-balanced-client-daemon)
+ * [ Site-Specific Configuration             ](#site-specific-configuration)
+ * [ Installation                            ](#installation)
+ * [ PowerDNS Configuration                  ](#powerdns-configuration)
+ * [ Starting the poller and PowerDNS        ](#starting-the-poller-and-powerdns)
+ * [ Conclusion                              ](#conclusion)
 
 
 Introduction
@@ -204,7 +204,9 @@ Site-Specific Configuration
   The lbbe and poller.config files in this package contain Stanford-specific
   configuration data. Unless you're going to run a load-balanced name service
   for Stanford, you'll want to edit those files replacing that data with values
-  appropriate for your DNS domain.
+  appropriate for your DNS domain. Simply change the configuration parameters
+  in the *Configuration / Initialization* section of _lbbe_ and modify
+  _poller.config_ per the comments therein.
 
 
 Installation
@@ -217,6 +219,9 @@ Installation
 PowerDNS Configuration
 ======================
 
+  Before configuring PowerDNS, make sure the [PowerDNS authoritative
+  nameserver][1] and [PowerDNS pipe backend][2] are installed.
+
   Configure PowerDNS to use lbbe by adding (or changing) the following lines
   in pdns.conf (usually found in /etc/powerdns or /etc/pdns):
 
@@ -262,3 +267,6 @@ Conclusion
 
   Share and enjoy.
 
+
+[1]:https://doc.powerdns.com/md/authoritative/
+[2]:https://doc.powerdns.com/authoritative/backends/pipe.html