[CLEANUP] rename client -> frontend

The 'client.c' file now only contained frontend-specific functions,
so it has naturally be renamed 'frontend.c'. Same for client.h. This
has also been an opportunity to remove some cross references from
files that should not have depended on it.

In the end, this file should contain a protocol-agnostic accept()
code, which would initialize a session, task, etc... based on an
accept() from a lower layer. Right now there are still references
to TCP.
diff --git a/include/proto/frontend.h b/include/proto/frontend.h
new file mode 100644
index 0000000..504acfa
--- /dev/null
+++ b/include/proto/frontend.h
@@ -0,0 +1,39 @@
+/*
+ * include/proto/frontend.h
+ * This file declares frontend-specific functions.
+ *
+ * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, version 2.1
+ * exclusively.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _PROTO_FRONTEND_H
+#define _PROTO_FRONTEND_H
+
+#include <common/config.h>
+#include <types/session.h>
+
+void get_frt_addr(struct session *s);
+int event_accept(int fd);
+
+
+#endif /* _PROTO_FRONTEND_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */