Include notification header size when checking if the new notification can fit in frame buffer without exceeding the max tcp frame size. Also fixed old comments.
Include notification header size when checking if the new notification
can fit in frame buffer without exceeding the max tcp frame size. Also
fixed old comments.

stuartnelson3/go-libapns,lnparker/go-libapns,joekarl/go-libapns,soundcloud/go-libapns