$NetBSD$

Detect NetBSD.

--- configure.orig	2014-06-27 19:52:28.000000000 +0000
+++ configure
@@ -291,6 +291,10 @@ case $CFG_OSTYPE in
         CFG_OSTYPE=unknown-freebsd
         ;;
 
+    NetBSD)
+        CFG_OSTYPE=-netbsd
+        ;;
+
     Darwin)
         CFG_OSTYPE=apple-darwin
         ;;
