Added documentation on the validation rules: Fixes #1426
Added documentation on the validation rules: Fixes #1426

InfoSec812/vertx-web,InfoSec812/vertx-web,InfoSec812/vertx-web,aesteve/vertx-web,InfoSec812/vertx-web,vert-x3/vertx-web,vert-x3/vertx-web,vert-x3/vertx-web,aesteve/vertx-web,InfoSec812/vertx-web,aesteve/vertx-web,vert-x3/vertx-web,vert-x3/vertx-web,aesteve/vertx-web,aesteve/vertx-web,InfoSec812/vertx-web