strconv: ParseBool should also accept "on"

[kristoffer-ingemansson]

HTML forms submit checkboxes as "on" when checked.
I think that strconv.ParseBool should return true for input str "on" as it would make parsing form data much easier.

https://github.com/golang/go/blob/release-branch.go1.9/src/strconv/atob.go#L12

I'm using: Go 1.8 on Windows

[mdempsky]

I think this is unlikely to change. Arguably it would be backwards incompatible, since the Go 1 docs specifically say inputs other than those enumerated will return an error.

[ianlancetaylor]

ParseBool is not intended for HTML form submit checkboxes. it's easy enough to write your own function. Closing.