$NetBSD$

Avoid bash-isms.

--- configure.orig	2017-01-13 22:09:58.000000000 +0000
+++ configure
@@ -3131,13 +3131,16 @@ case $host_os in *\ *) host_os=`echo "$h
 
 
 
- if test "${host//mingw/}" != "${host}" -o "${host//msvc/}" != "${host}"; then
+case "${host}" in
+*mingw* | *msvc* )
   WINDOWS_TRUE=
   WINDOWS_FALSE='#'
-else
+  ;;
+* )
   WINDOWS_TRUE='#'
   WINDOWS_FALSE=
-fi
+  ;;
+esac
 
 
 case `pwd` in
