update README for known --update option
update README for known --update option

hechunwen/phpbrew,konomae/phpbrew,kayyyy/phpbrew,kayyyy/phpbrew,konomae/phpbrew,kayyyy/phpbrew,zonuexe/phpbrew,mengzyou/phpbrew,mengzyou/phpbrew,pinkbigmacmedia/phpbrew,svetlyak40wt/phpbrew,svetlyak40wt/phpbrew,davidfuhr/phpbrew,dduca-sugarcrm/phpbrew,wellic/phpbrew,wellic/phpbrew,svetlyak40wt/phpbrew,williamn/phpbrew,hechunwen/phpbrew,pierredup/phpbrew,zonuexe/phpbrew,zonuexe/phpbrew,konomae/phpbrew,phpbrew/phpbrew,svetlyak40wt/phpbrew,viniciusferreira/phpbrew,williamn/phpbrew,dduca-sugarcrm/phpbrew,davidfuhr/phpbrew,phpbrew/phpbrew,wellic/phpbrew,davidfuhr/phpbrew,davidfuhr/phpbrew,morozov/phpbrew,mengzyou/phpbrew,williamn/phpbrew,davidfuhr/phpbrew,dduca-sugarcrm/phpbrew,konomae/phpbrew,phpbrew/phpbrew,pierredup/phpbrew,hechunwen/phpbrew,pinkbigmacmedia/phpbrew,viniciusferreira/phpbrew,pierredup/phpbrew,pierredup/phpbrew,pinkbigmacmedia/phpbrew,morozov/phpbrew,mengzyou/phpbrew,hechunwen/phpbrew,viniciusferreira/phpbrew,zonuexe/phpbrew,wellic/phpbrew,kayyyy/phpbrew,williamn/phpbrew,viniciusferreira/phpbrew,dduca-sugarcrm/phpbrew,pinkbigmacmedia/phpbrew