Use a config cache.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2031 d4fa192b-c00b-0410-8231-f00ffab90ce4

autogen.des

@@ -11,6 +11,7 @@ set -ex
 export CONFIG_SHELL=/bin/sh
 
 ./configure \
+    --config-cache \
     --enable-developer-warnings \
     --enable-debugging-symbols \
     --enable-dependency-tracking \