Merge branch 'cw/prelim-cleanup'

Shuffle some bits across headers and sources to prepare for
libification effort.

* cw/prelim-cleanup:
  parse: separate out parsing functions from config.h
  config: correct bad boolean env value error message
  wrapper: reduce scope of remove_or_warn()
  hex-ll: separate out non-hash-algo functions

unpack-trees.c

@@ -2,7 +2,7 @@
 #include "advice.h"
 #include "strvec.h"
 #include "repository.h"
-#include "config.h"
+#include "parse.h"
 #include "dir.h"
 #include "environment.h"
 #include "gettext.h"