Merge r3823: Clean default.vcl on distclean

Distclean (in the build directory) should clean out default.vcl in the
build directory.  This fixes a strange FTBFS on FreeBSD.



git-svn-id: http://www.varnish-cache.org/svn/branches/2.0@3962 d4fa192b-c00b-0410-8231-f00ffab90ce4

etc/Makefile.am

 # $Id$
 
 EXTRA_DIST = zope-plone.vcl
+DISTCLEANFILES = default.vcl
 
 dist_varnishconf_DATA = default.vcl