Adding upstream version 1:1.3.2.upstream/1%1.3.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Icinga Certificate Monitoring
+
+The certificate monitoring module for Icinga keeps track of certificates as they are deployed in a network environment.
+It does this by scanning networks for TLS services and collects whatever certificates it finds along the way.
+The certificates are verified using its own trust store.
+
+The module’s web frontend can be used to view scan results, allowing you to drill down into detailed information
+about any discovered certificate of your landscape:
+
+![X.509 Usage](res/x509-usage.png "X.509 Usage")
+
+![X.509 Certificates](res/x509-certificates.png "X.509 Certificates")
+
+At a glance you see which CAs have issued your certificates and key counters of your environment:
+
+![X.509 Dashboard](res/x509-dashboard.png "X.509 Dashboard")
+
+## Documentation
+
+* [Installation](02-Installation.md)
+* [Configuration](03-Configuration.md)
+* [Monitoring](10-Monitoring.md)