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

The STATS_DEFAULT_REALM and STATS_DEFAULT_URI were moved to defaults.h.
It was required to include types/pattern.h and types/sample.h since they
are mentioned in function prototypes.

It would be wise to merge this with uri_auth.h later.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 0505611..23a290e 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -34,6 +34,7 @@
 #include <unistd.h>
 
 #include <haproxy/action-t.h>
+#include <haproxy/auth.h>
 #include <haproxy/api.h>
 #include <common/cfgparse.h>
 #include <haproxy/chunk.h>
@@ -55,7 +56,6 @@
 #include <types/stats.h>
 
 #include <proto/acl.h>
-#include <proto/auth.h>
 #include <proto/backend.h>
 #include <proto/channel.h>
 #include <proto/checks.h>