Package is no longer architecture specific

[elacy]

This is to resolve this issue: #239
Netgate devices run on arm, and by default FreeBSD will make the package specific to whatever architecture you build it on. By adding NO_ARCH=yes the package will not be architecture specific and so it won't require that you force install. It also allows you to do automatic updates.

You might have thought that Netgate would get around to making their own api for pfsense+ like you mentioned in this issue, sadly not.

[jaredhendrickson13]

Looks good to me, thanks!

I will note that not supporting amd64 and aarch64 installations is more of an intentional decision than a technical limitation. Without purchasing Netgate hardware, I only have access to publicly available (amd64) builds of pfSense, this includes the amd64 builds of pfSense Plus. Even though it's very unlikely, if a conflict did arise in the future I would be unable to effectively troubleshoot or write tests for potential issues specific to different architectures. However, this change will allow this subset of users to use the package without force installing; which will retain certain features for users installing the package on non-supported architectures.

Thanks again!