Include file cleanups..

Add <limits.h> to the include files handled by "cache.h", and remove
extraneous #include directives from various .c files. The rule is that
"cache.h" gets all the basic stuff, so that we'll have as few system
dependencies as possible.

cache.h

@@ -10,6 +10,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <errno.h>
+#include <limits.h>
 #include <sys/mman.h>
 #include <sys/param.h>
 #include <netinet/in.h>

commit-tree.c

@@ -7,9 +7,7 @@
 
 #include <pwd.h>
 #include <time.h>
-#include <string.h>
 #include <ctype.h>
-#include <time.h>
 
 #define BLOCKING (1ul << 14)
 

commit.c

@@ -1,8 +1,6 @@
 #include "tag.h"
 #include "commit.h"
 #include "cache.h"
-#include <string.h>
-#include <limits.h>
 
 const char *commit_type = "commit";
 

date.c

@@ -4,9 +4,6 @@
  * Copyright (C) Linus Torvalds, 2005
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include <ctype.h>
 #include <time.h>
 

delta.c

@@ -5,7 +5,6 @@
 #include "tag.h"
 #include "delta.h"
 #include "cache.h"
-#include <string.h>
 
 /* the delta object definition (it can alias any other object) */
 struct delta {

diff-helper.c

@@ -1,7 +1,6 @@
 /*
  * Copyright (C) 2005 Junio C Hamano
  */
-#include <limits.h>
 #include "cache.h"
 #include "strbuf.h"
 #include "diff.h"

diff.c

@@ -4,7 +4,6 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <signal.h>
-#include <limits.h>
 #include "cache.h"
 #include "diff.h"
 #include "diffcore.h"

http-pull.c

@@ -1,11 +1,5 @@
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
 #include "cache.h"
 #include "commit.h"
-#include <errno.h>
-#include <stdio.h>
 
 #include "pull.h"
 

local-pull.c

@@ -1,15 +1,8 @@
 /*
  * Copyright (C) 2005 Junio C Hamano
  */
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <limits.h>
 #include "cache.h"
 #include "commit.h"
-#include <errno.h>
-#include <stdio.h>
 #include "pull.h"
 
 static int use_link = 0;

object.c

@@ -5,8 +5,6 @@
 #include "cache.h"
 #include "tag.h"
 #include "delta.h"
-#include <stdlib.h>
-#include <string.h>
 
 struct object **objs;
 int nr_objs;

read-cache.c

@@ -3,7 +3,6 @@
  *
  * Copyright (C) Linus Torvalds, 2005
  */
-#include <stdarg.h>
 #include "cache.h"
 
 struct cache_entry **active_cache = NULL;

rpull.c

@@ -1,11 +1,5 @@
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
 #include "cache.h"
 #include "commit.h"
-#include <errno.h>
-#include <stdio.h>
 #include "rsh.h"
 #include "pull.h"
 

sha1_file.c

@@ -6,8 +6,6 @@
  * This handles basic git sha1 object files - packing, unpacking,
  * creation etc.
  */
-#include <stdarg.h>
-#include <limits.h>
 #include "cache.h"
 #include "delta.h"
 

usage.c

@@ -3,7 +3,6 @@
  *
  * Copyright (C) Linus Torvalds, 2005
  */
-#include <stdarg.h>
 #include "cache.h"
 
 static void report(const char *prefix, const char *err, va_list params)