fix two broken links

howto/puppet.md

@@ -1157,7 +1157,8 @@ We are in the process of transitioning over to this mechanism from our
 previous set of custom YAML lookup system. This documents the way we
 currently use Hiera.
 
-[Hiera]: https://puppet.com/docs/hiera/3.2/
+[Hiera]: https://puppet.com/docs/hiera/
+
 
 #### Classes definitions
 
@@ -1349,7 +1350,7 @@ Puppet is hooked into Nagios in two ways:
 
  * one job runs on the Puppetmaster and checks PuppetDB for
    reports. this was done with a [patched](https://github.com/evgeni/check_puppetdb_nodes/pull/14) version of the
-   [check_puppetdb_nodes](https://github.com/evgeni/check_puppetdb_nodes/_) Nagios check, now packaged inside the
+   [check_puppetdb_nodes](https://github.com/evgeni/check_puppetdb_nodes/) Nagios check, now packaged inside the
    `tor-nagios-checks` Debian package
  * another job runs on each Puppet node and will therefore work even
    if the Puppetmaster dies for some reason. this is done with the