Add abstract frontend to HTTP support and stop using curl on Windows

code/client/cl_http.h

@@ -0,0 +1,34 @@
+/*
+===========================================================================
+Copyright (C) 2006 Tony J. White (tjw@tjw.org)
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Quake III Arena source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+#ifndef __CL_HTTP_H__
+#define __CL_HTTP_H__
+
+#include "../qcommon/q_shared.h"
+
+qboolean CL_HTTP_Init( void );
+qboolean CL_HTTP_Available( void );
+void CL_HTTP_Shutdown( void );
+void CL_HTTP_BeginDownload( const char *localName, const char *remoteURL );
+void CL_HTTP_PerformDownload( void );
+
+#endif	// __CL_HTTP_H__