add example of machine specific YAML file

sim/custom_config.yml

@@ -0,0 +1,11 @@
+
+# example of a machine specific settings
+windows:
+  mainwindow:
+    kwargs:
+      confirm_exit: false
+
+data_plugins:
+  status:
+    kwargs:
+      cycle_time: 73

sim/xyz.ini

@@ -6,6 +6,13 @@ DEBUG = 0
 
 [DISPLAY]
 DISPLAY = qtpyvcp
+
+#     Comand Line Args
+CONFIRM_EXIT = False
+CONFIG_FILE = custom_config.yml
+;FULLSCREEN = True
+;MAXIMIZE = True
+
 POSITION_OFFSET = RELATIVE
 POSITION_FEEDBACK = ACTUAL
 MAX_FEED_OVERRIDE = 2.000000
@@ -14,15 +21,16 @@ MIN_SPINDLE_OVERRIDE = 0.500000
 INTRO_GRAPHIC = linuxcnc.gif
 INTRO_TIME = 1
 
-; File Paths:
-;   File paths can be relative to the config dir:
-;     LOG_FILE = hazzy.log
-;   Or relative to $HOME: (May not be compatible with other GUIs!)
-;     LOG_FILE = ~/hazzy.log
-;   Or at an absolute location:
-;     LOG_FILE = /home/<USER>/hazzy.log
+# File Paths:
+#   File paths can be relative to the config dir:
+#     LOG_FILE = qtpyvcp.log
+#   Or relative to $HOME: (May not be compatible with other GUIs!)
+#     LOG_FILE = ~/qtpyvcp.log
+#   Or at an absolute location:
+#     LOG_FILE = /home/<USER>/qtpyvcp.log
+#   Enviroment vars are also expanded:
+#     LOG_FILE = $CONFIG_DIR/qtpyvcp.log
 
-;If not specified, locations default to $HOME
 LOG_FILE = sim.log
 PREFERENCE_FILE = sim.pref
 PROGRAM_PREFIX = ~/linuxcnc/nc_files