const char *opt_preferred = session_setting_oneval(sdb, PZ_PREFERRED);
const char *extra_args = session_setting_oneval(sdb, PZ_EXTRA_ARGS);
const char *opt_present_chunk = session_setting_oneval(sdb, PZ_PRESENT_CHUNK);
const char *opt_preferred = session_setting_oneval(sdb, PZ_PREFERRED);
const char *extra_args = session_setting_oneval(sdb, PZ_EXTRA_ARGS);
const char *opt_present_chunk = session_setting_oneval(sdb, PZ_PRESENT_CHUNK);