BindUnlock resource

When true, the emulator will unlock the keyboard as soon as the host sends a BIND image. Otherwise, it will wait until the host sends a Write command.

Note that in some previous releases, unlocking as soon as the BIND image was received was the default, and this behavior could be overridden (forcing the emulator to wait for the Write) by a B prefix on the host name. Since waiting for the Write is now the default, the B prefix has become a no-op.