Description of problem:
We recently updated to a snapshot version of vorbis-tools to pull in flac again.
 However, that broke http support for e.g. ogg123.  After some debugging, it
appears this is because #define HAVE_FLAC 1 is no longer getting set in config.h
even if curl-devel is installed and configure finds it.  We're missing an
AC_DEFINE it appears.

Patch to configure.ac fixes it:

--- vorbis-tools-1.1.1.svn20070412/configure.ac.libcurl 2007-05-16
13:04:09.000000000 -0400
+++ vorbis-tools-1.1.1.svn20070412/configure.ac 2007-05-16 12:56:40.000000000 -0400
@@ -165,6 +165,9 @@ if test "x$HAVE_PKG_CONFIG" = "xyes"; th
 else
   AM_PATH_CURL(HAVE_CURL=yes, HAVE_CURL=no; AC_MSG_WARN(libcurl missing))
 fi
+if test "x$HAVE_CURL" = "xyes"; then
+  AC_DEFINE(HAVE_CURL,1,[Defined if we have libcurl])
+fi
 
 if test "x$build_ogg123" = xyes; then
   AC_MSG_RESULT([checking for ogg123 requirements])