Starting in 5.0 this feature must be selected from within the UI in order to be able to unlock the bootloader. It does not unlock the bootloader, just allows the user to do so - assuming that the OEM's bootloader software also allows for this.
thanks. i went into the developer options and turned it on thought it would bring back some nofe 4 features that it was missing lol. guess i can turn it back off if thats all it does