REORG: include: move acl.h to haproxy/acl.h{,-t}.h

The files were moved almost as-is, just dropping arg-t and auth-t from
acl-t but keeping arg-t in acl.h. It was useful to revisit the call places
since a handful of files used to continue to include acl.h while they did
not need it at all. Struct stream was only made a forward declaration
since not otherwise needed.
diff --git a/src/http_acl.c b/src/http_acl.c
index 0b6adfd..17a818e 100644
--- a/src/http_acl.c
+++ b/src/http_acl.c
@@ -16,6 +16,7 @@
 #include <string.h>
 #include <time.h>
 
+#include <haproxy/acl.h>
 #include <haproxy/auth.h>
 #include <haproxy/api.h>
 #include <haproxy/chunk.h>
@@ -25,7 +26,6 @@
 #include <haproxy/tools.h>
 #include <haproxy/version.h>
 
-#include <proto/acl.h>
 #include <haproxy/arg.h>