REORG: include: move common/h1.h to haproxy/h1.h

The file was moved as-is. There was a wrong dependency on dynbuf.h
instead of buf.h which was addressed. There was no benefit to
splitting this between types and functions.
diff --git a/src/hlua.c b/src/hlua.c
index 0a3362a..d73abec 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -28,7 +28,7 @@
 #include <haproxy/thread.h>
 #include <haproxy/regex.h>
 #include <haproxy/xref.h>
-#include <common/h1.h>
+#include <haproxy/h1.h>
 #include <common/standard.h>
 
 #include <types/cli.h>