[seiscomp, scanloc] Install, add .gitignore

etc/defaults/screloc.cfg

@@ -0,0 +1,8 @@
+# Defines the primary group of a module. This is the name of the group where a
+# module sends its messages to if the target group is not explicitely given in
+# the send call.
+connection.primaryGroup = LOCATION
+
+# Defines a list of message groups to subscribe to. The default is usually
+# given by the application and does not need to be changed.
+connection.subscriptions = PICK, LOCATION