Add an OpenSSL compatible ./config wrapper

This allows sofware expecting OpenSSL's config script, to a limited
extent, to continue building without changes.

Thanks to technion for pointing this out and providing the initial
patch.

config

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# This file exists for backwards-compatibility with build systems that expect a
+# config script similar to OpenSSL's.
+
+# New software should prefer the native configure script over this one.
+
+ARGS=""
+for var in "$@"; do
+	case $var in
+		no-shared ) ARGS="$ARGS --disable-shared";;
+		no-asm    ) ARGS="$ARGS --disable-asm";;
+		--prefix* ) ARGS="$ARGS $var";;
+	esac
+done
+
+./configure $ARGS