configure scripts and FreeBSD-10

[Montgomery-Smith, Stephen]

I have ports with configure scripts that include lines like

freebsd1*)

Now obviously the script will choose this case when I am running
FreeBSD-10 as well as FreeBSD-1.

What solutions have people used to deal with this?    Does anyone have
good examples of ports I can look at where this was solved?  Somebody
sent me a patch that replaces freebsd1*) with freebsd1[!0]*), but that
will fail when FreeBSD-11 comes out.

Thanks, Stephen