Allow models to set formatting defaults

Originally omitted when model settings were forced. Now that models can only define the defaults for KoboldAI its a good idea to give model authors control over what formatting they think works best for their models.

aiserver.py

@@ -915,6 +915,8 @@ def loadmodelsettings():
             vars.rep_pen    = js["rep_pen"]
         if("adventure" in js):
             vars.adventure = js["adventure"]
+        if("formatoptns" in js):
+            vars.formatoptns = js["formatoptns"]
         model_config.close()
 
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