Merge branch '3.1-pinebook'

- Also document the config file some more.

src/modules/plasmalnf/plasmalnf.conf

@@ -1,3 +1,13 @@
+# The Plasma Look-and-Feel module allows selecting a Plasma
+# Look-and-Feel in the live- or host-system and switches the
+# host Plasma session immediately to the chosen LnF; it
+# can also write a LnF configuration to the target user / on
+# the target system.
+#
+# This module should be used once in a view section (to get
+# the UI) and once in the exec section (to apply the selection
+# to the target user). It should come **after** the user module
+# in exec, so that the target user has been created alrady.
 ---
 # Full path to the Plasma look-and-feel tool (CLI program
 # for querying and applying Plasma themes).