Documentation seems divert from suhosin.c

Looking into suhosin.c, it seems that "suhosin.session.cryptua" defaults to ´Off´:

$ grep suhosin.session.cryptua suhosin.c
	STD_ZEND_INI_BOOLEAN("suhosin.session.cryptua",		"0",		ZEND_INI_PERDIR|ZEND_INI_SYSTEM,	OnUpdateBool, session_cryptua,	zend_suhosin_globals,	suhosin_globals)
 
While http://suhosin.org/stories/configuration.html#suhosin-session-cryptua says ´On´.

I'm wrong?!? With kind regards, Jan.