Prolog Flags

Detailed Description

Modules
	C-code to handle Prolog flags.
	Low-level code to support flags.
	Predicates to access Prolog flags.
	the following builins provide read-write access the Prolog flags
	Prolog Support
	YAP Global Flags
	YAP Thread-local flags
	Prolog flags that can take different values in different threads and/or modules.