create datserver directory

src/freedombone-app-datserver

 
     set_completion_param "datserver version" "$DATSERVER_DAT_VERSION"
 
+    if [ -d $DATSERVER_DIRECTORY ]; then
+        rm -rf $DATSERVER_DIRECTORY
+    fi
+    mkdir $DATSERVER_DIRECTORY
     useradd -d "$DATSERVER_DIRECTORY" -s /bin/false datserver
     if [ ! -d $DATSERVER_DIRECTORY ]; then
         echo $'dat directory was not created'