Quick patch from Andrew to recognize nextstep vs next as a port

src/customize

@@ -89,7 +89,7 @@ echo "   hpux           HP PA-RISC on HP-UX 9.0"
 echo "   i386_solaris   i386 Solaris"
 echo "   irix5          SGI MIPS on IRIX 5.3 or better"
 echo "   linux          Intel x86 on Linux 1.2 and Linux ELF"
-echo "   next           Motorola MC68K or Intel x86 on NeXTSTEP 3.2"
+echo "   nextstep       Motorola MC68K or Intel x86 on NeXTSTEP 3.2"
 echo "   sparc_solaris  SUN SPARC on Solaris 2.4"
 echo "   sunos4         SUN SPARC on SunOS 4.1.3"
 echo "   svr4           Intel x86 on Intel SVR4"