Merge branch 'en/header-split-cache-h'

Header clean-up.

* en/header-split-cache-h: (24 commits)
  protocol.h: move definition of DEFAULT_GIT_PORT from cache.h
  mailmap, quote: move declarations of global vars to correct unit
  treewide: reduce includes of cache.h in other headers
  treewide: remove double forward declaration of read_in_full
  cache.h: remove unnecessary includes
  treewide: remove cache.h inclusion due to pager.h changes
  pager.h: move declarations for pager.c functions from cache.h
  treewide: remove cache.h inclusion due to editor.h changes
  editor: move editor-related functions and declarations into common file
  treewide: remove cache.h inclusion due to object.h changes
  object.h: move some inline functions and defines from cache.h
  treewide: remove cache.h inclusion due to object-file.h changes
  object-file.h: move declarations for object-file.c functions from cache.h
  treewide: remove cache.h inclusion due to git-zlib changes
  git-zlib: move declarations for git-zlib functions from cache.h
  treewide: remove cache.h inclusion due to object-name.h changes
  object-name.h: move declarations for object-name.c functions from cache.h
  treewide: remove unnecessary cache.h inclusion
  treewide: be explicit about dependence on mem-pool.h
  treewide: be explicit about dependence on oid-array.h
  ...

builtin/clone.c

@@ -11,6 +11,7 @@
 #define USE_THE_INDEX_VARIABLE
 #include "builtin.h"
 #include "abspath.h"
+#include "advice.h"
 #include "config.h"
 #include "environment.h"
 #include "gettext.h"
@@ -20,6 +21,7 @@
 #include "fetch-pack.h"
 #include "refs.h"
 #include "refspec.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "tree.h"
 #include "tree-walk.h"
@@ -40,6 +42,7 @@
 #include "hook.h"
 #include "bundle.h"
 #include "bundle-uri.h"
+#include "wrapper.h"
 
 /*
  * Overall FIXMEs: