update to 6.3 p1

[Wojciech Puchar]

>
> The following files will be updated as part of updating to 6.3-RELEASE-p1:
> /boot/GENERIC/kernel
> /usr/src/sys/conf/newvers.sh
> /usr/src/sys/kern/kern_descrip.c
> /usr/src/sys/kern/uipc_syscalls.c
>
> I have installed the updates but my question is whether these updates
> mean that the system has to be rebooted?

it's in kernel - so yes.
if you have your custom kernel - recompile it.

>
> Secondly, as there seem to be some changes to the kernel, does it mean
> I have to build a new custom kernel which I currently use?

just type make in your kernel build directory and make install