I have a couple of quick fixes here.
The first fixes up some things in nls.mk related to a file move. The
second is some cleanup because some function you are using has been
removed in the meantime; you probably found that yourself while rebasing.
The pg_walsummary patch doesn't have a nls.mk, but you also comment that
it doesn't have tests yet, so I assume it's not considered complete yet
anyway.
