MEDIUM: mux-h1/h1-htx: move HTX convertion of H1 messages in dedicated file

To avoid code duplication in the futur mux FCGI, functions parsing H1 messages
and converting them into HTX have been moved in the file h1_htx.c. Some
specific parts remain in the mux H1. But most of the parsing is now generic.
diff --git a/include/proto/h1_htx.h b/include/proto/h1_htx.h
new file mode 100644
index 0000000..da37215
--- /dev/null
+++ b/include/proto/h1_htx.h
@@ -0,0 +1,45 @@
+/*
+ * include/types/h1_htx.h
+ * This file defines function prototypes for H1 manipulation using the
+ * internal representation.
+ *
+ * Copyright (C) 2019 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com>
+ *
+ * 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_H1_HTX_H
+#define _PROTO_H1_HTX_H
+
+#include <common/buf.h>
+#include <common/ist.h>
+#include <common/h1.h>
+
+int h1_parse_msg_hdrs(struct h1m *h1m, union h1_sl *h1sl, struct htx *dsthtx,
+		      struct buffer *srcbuf, size_t ofs, size_t max);
+int h1_parse_msg_data(struct h1m *h1m, struct htx *dsthtx,
+		      struct buffer *srcbuf, size_t ofs, size_t max,
+		      struct buffer *htxbuf);
+int h1_parse_msg_tlrs(struct h1m *h1m, struct htx *dsthtx,
+		      struct buffer *srcbuf, size_t ofs, size_t max);
+
+#endif /* _PROTO_H1_HTX_H */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */