REORG: include: split common/htx.h into haproxy/htx{,-t}.h
Most of the file was a large set of HTX elements manipulation functions
and few types, so splitting them allowed to further reduce dependencies
and shrink the build time. Doing so revealed that a few files (h2.c,
mux_pt.c) needed haproxy/buf.h and were previously getting it through
htx.h. They were fixed.
diff --git a/src/http_htx.c b/src/http_htx.c
index d410f03..f345b4b 100644
--- a/src/http_htx.c
+++ b/src/http_htx.c
@@ -21,7 +21,7 @@
#include <common/cfgparse.h>
#include <haproxy/h1.h>
#include <haproxy/http.h>
-#include <common/htx.h>
+#include <haproxy/htx.h>
#include <proto/arg.h>
#include <proto/http_htx.h>