get_config_string
Retrieves a string from the configuration file.
Description
const char *get_config_string(const char *section,
const char *name,
const char *def
);
Retrieves a string variable from the current config file. The section name
may be set to NULL to read variables from the root of the file, or used to
control which set of parameters (eg. sound or joystick) you are interested
in reading. Example:
const char *lang = get_config_string("system", "language", "EN");
Returns a pointer to the constant string found in the configuration file.
If the named variable cannot be found, or its entry in the config file is
empty, the value of `def' is returned.
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