pmgconfig.adoc: add some screenshots

pmg.admin-conf-opts.adoc

@@ -0,0 +1,24 @@
+`advfilter`: `<boolean>` ('default =' `1`)::
+
+Use advanced filters for statistic.
+
+`dailyreport`: `<boolean>` ('default =' `1`)::
+
+Send daily reports.
+
+`demo`: `<boolean>` ('default =' `0`)::
+
+Demo mode - do not start SMTP filter.
+
+`email`: `<string>` ('default =' `admin@domain.tld`)::
+
+Administrator E-Mail address.
+
+`http_proxy`: `http://.*` ::
+
+Specify external http proxy which is used for downloads (example: 'http://username:password@host:port/')
+
+`statlifetime`: `<integer> (1 - N)` ('default =' `7`)::
+
+User Statistics Lifetime (days)
+

pmgconfig.adoc

@@ -25,7 +25,48 @@ Configuration Management Toolkit
 :pmg-toplevel:
 endif::manvolnum[]
 
-Toolkit to simplify common configuration tasks.
+{pmg} is usually configured using the web-based Graphical User
+Interface (GUI), but it is also possible to directly edit the
+configuration files, use the REST API over 'https'
+or the command line tool 'pmgsh'.
+
+The command line tool 'pmgconfig' is used to simplify some common
+configuration tasks, i.e. to generate cerificates and to rewrite
+service configuration files.
+
+System Configuration
+--------------------
+
+Network and Time
+~~~~~~~~~~~~~~~~
+
+ifndef::manvolnum[]
+image::images/screenshot/pmg-gui-network-config.png[]
+endif::manvolnum[]
+
+TODO
+
+
+Options
+~~~~~~~
+
+ifndef::manvolnum[]
+image::images/screenshot/pmg-gui-system-options.png[]
+endif::manvolnum[]
+
+include::pmg.admin-conf-opts.adoc[]
+
+
+Backup and Restore
+~~~~~~~~~~~~~~~~~~
+
+ifndef::manvolnum[]
+image::images/screenshot/pmg-gui-backup.png[]
+endif::manvolnum[]
+
+TODO
+
+
 
 ifdef::manvolnum[]
 include::pmg-copyright.adoc[]