added acknowledgement for vendored modules
added acknowledgement for vendored modules

cyrilthank/bitstarter,mitni455/restler,uw-oris/restler,blakevanlan/restless,Tetpay/restler,dkoleary88/restler,lo1tuma/restler,MillerRen/restler,hydepark83/bitstarter,jadbaz/restler,djchie/restler-1,habibmasuro/restler,prusik/restler,danwrong/restler,dam1/restler-perso,benjisg/restler,tobiwild/restler,mishguruorg/restler