REORG: include: move common/namespace.h to haproxy/namespace{,-t}.h
The type was moved out as it's used by standard.h for netns_entry.
Instead of just being a forward declaration when not used, it's an
empty struct, which makes gdb happier (the resulting stripped executable
is the same).
diff --git a/src/connection.c b/src/connection.c
index a74585a..688be9a 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -14,7 +14,7 @@
#include <haproxy/api.h>
#include <common/cfgparse.h>
-#include <common/namespace.h>
+#include <haproxy/namespace.h>
#include <haproxy/hash.h>
#include <haproxy/net_helper.h>