Enable new ASCII parser in mcrouter options
Enable new ASCII parser in mcrouter options

Summary: title

Test Plan: tests

Reviewed By: @alikhtarov

Differential Revision: D2009547
zhlong73/mcrouter,glensc/mcrouter,easyfmxu/mcrouter,facebook/mcrouter,yqzhang/mcrouter,leitao/mcrouter,glensc/mcrouter,evertrue/mcrouter,zhlong73/mcrouter,yqzhang/mcrouter,nvaller/mcrouter,facebook/mcrouter,reddit/mcrouter,glensc/mcrouter,reddit/mcrouter,yqzhang/mcrouter,leitao/mcrouter,synecdoche/mcrouter,nvaller/mcrouter,is00hcw/mcrouter,yqzhang/mcrouter,easyfmxu/mcrouter,is00hcw/mcrouter,tempbottle/mcrouter,is00hcw/mcrouter,reddit/mcrouter,nvaller/mcrouter,leitao/mcrouter,evertrue/mcrouter,synecdoche/mcrouter,tempbottle/mcrouter,zhlong73/mcrouter,tempbottle/mcrouter,synecdoche/mcrouter,reddit/mcrouter,easyfmxu/mcrouter,nvaller/mcrouter,tempbottle/mcrouter,evertrue/mcrouter,leitao/mcrouter,glensc/mcrouter,zhlong73/mcrouter,facebook/mcrouter,synecdoche/mcrouter,is00hcw/mcrouter,easyfmxu/mcrouter,facebook/mcrouter,evertrue/mcrouter