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

No change was necessary, it was already properly split.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 373a321..205f4fb 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -35,7 +35,7 @@
 
 #include <haproxy/api.h>
 #include <common/cfgparse.h>
-#include <common/chunk.h>
+#include <haproxy/chunk.h>
 #include <haproxy/errors.h>
 #include <haproxy/pool.h>
 #include <common/standard.h>