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
  ...

t/helper/test-date.c

@@ -1,6 +1,6 @@
 #include "test-tool.h"
-#include "cache.h"
 #include "date.h"
+#include "trace.h"
 
 static const char *usage_msg = "\n"
 "  test-tool date relative [time_t]...\n"

t/helper/test-fast-rebase.c

@@ -20,6 +20,7 @@
 #include "hex.h"
 #include "lockfile.h"
 #include "merge-ort.h"
+#include "object-name.h"
 #include "refs.h"
 #include "revision.h"
 #include "sequencer.h"

t/helper/test-lazy-init-name-hash.c

@@ -4,6 +4,7 @@
 #include "environment.h"
 #include "parse-options.h"
 #include "setup.h"
+#include "trace.h"
 
 static int single;
 static int multi;

t/helper/test-match-trees.c

@@ -1,6 +1,7 @@
 #include "test-tool.h"
 #include "cache.h"
 #include "hex.h"
+#include "object-name.h"
 #include "setup.h"
 #include "tree.h"
 

t/helper/test-mergesort.c

@@ -1,5 +1,6 @@
 #include "test-tool.h"
 #include "cache.h"
+#include "mem-pool.h"
 #include "mergesort.h"
 
 static uint32_t minstd_rand(uint32_t *state)

t/helper/test-oidmap.c

@@ -1,6 +1,6 @@
 #include "test-tool.h"
-#include "cache.h"
 #include "hex.h"
+#include "object-name.h"
 #include "oidmap.h"
 #include "setup.h"
 #include "strbuf.h"

t/helper/test-path-utils.c

@@ -4,6 +4,7 @@
 #include "environment.h"
 #include "setup.h"
 #include "string-list.h"
+#include "trace.h"
 #include "utf8.h"
 
 /*

t/helper/test-reach.c

@@ -1,11 +1,11 @@
 #include "test-tool.h"
-#include "cache.h"
 #include "alloc.h"
 #include "commit.h"
 #include "commit-reach.h"
 #include "config.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-name.h"
 #include "parse-options.h"
 #include "ref-filter.h"
 #include "setup.h"

t/helper/test-submodule-config.c

@@ -1,6 +1,6 @@
 #include "test-tool.h"
-#include "cache.h"
 #include "config.h"
+#include "object-name.h"
 #include "setup.h"
 #include "submodule-config.h"
 #include "submodule.h"