some documentation fixes (#640)

* a few more files to ignore

* the pgtune we reference seems to be dead, provide
a few alternatives.

* steal pod syntax check from snmp::info, but don't bother with checking Test::Pod version.
we want 1.22 or later, which was released in 2005

* reference the release notes in our wiki. changes you need to make manually during upgrades are documented there.

* add pod test to manifest

* term was defined around line 111 and then again at line 209, rename the second one

META.yml

@@ -14,7 +14,7 @@ configure_requires:
   DBIx::Class: '0.082810'
   Module::Build: '0.42'
 dynamic_config: 1
-generated_by: 'Module::Build version 0.4224, CPAN::Meta::Converter version 2.150010'
+generated_by: 'Module::Build version 0.4229, CPAN::Meta::Converter version 2.150010'
 license: bsd
 meta-spec:
   url: http://module-build.sourceforge.net/META-spec-v1.4.html
@@ -38,7 +38,7 @@ provides:
     file: lib/App/Netdisco/Configuration.pm
   App::Netdisco::DB:
     file: lib/App/Netdisco/DB.pm
-    version: '58'
+    version: '59'
   App::Netdisco::DB::ExplicitLocking:
     file: lib/App/Netdisco/DB/ExplicitLocking.pm
   App::Netdisco::DB::Result::Admin:
@@ -121,6 +121,8 @@ provides:
     file: lib/App/Netdisco/DB/Result/Virtual/DuplexMismatch.pm
   App::Netdisco::DB::Result::Virtual::GenericReport:
     file: lib/App/Netdisco/DB/Result/Virtual/GenericReport.pm
+  App::Netdisco::DB::Result::Virtual::LastNode:
+    file: lib/App/Netdisco/DB/Result/Virtual/LastNode.pm
   App::Netdisco::DB::Result::Virtual::NodeIp4:
     file: lib/App/Netdisco/DB/Result/Virtual/NodeIp4.pm
   App::Netdisco::DB::Result::Virtual::NodeIp6:
@@ -483,6 +485,7 @@ requires:
   App::cpanminus: '1.6108'
   App::local::lib::helper: '0.07'
   Archive::Extract: '0'
+  Authen::Radius: '0'
   CGI::Expand: '2.05'
   DBD::Pg: '0'
   DBIx::Class: '0.082841'
@@ -556,7 +559,7 @@ resources:
   MailingList: https://lists.sourceforge.net/lists/listinfo/netdisco-users
   bugtracker: https://github.com/netdisco/netdisco/issues
   homepage: http://netdisco.org/
-  license: http://opensource.org/licenses/BSD-3-Clause
+  license: http://opensource.org/licenses/bsd-license.php
   repository: https://github.com/netdisco/netdisco
 version: '2.042010'
 x_serialization_backend: 'CPAN::Meta::YAML version 0.018'