Skips the next n bytes from the stream, advancing the seek position.
Unlike toss which is infallible, in this function n can be any amount.
Returns error.EndOfStream if fewer than n bytes could be discarded.
See also:
tossdiscardRemainingdiscardShortdiscardpub fn discardAll(r: *Reader, n: usize) Error!void
pub fn discardAll(r: *Reader, n: usize) Error!void {
if ((try r.discardShort(n)) != n) return error.EndOfStream;
}