Merge branch 'tr/die_errno'

* tr/die_errno:
  Use die_errno() instead of die() when checking syscalls
  Convert existing die(..., strerror(errno)) to die_errno()
  die_errno(): double % in strerror() output just in case
  Introduce die_errno() that appends strerror(errno) to die()

builtin-send-pack.c

@@ -59,7 +59,7 @@ static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *ext
 	po.out = fd;
 	po.git_cmd = 1;
 	if (start_command(&po))
-		die("git pack-objects failed (%s)", strerror(errno));
+		die_errno("git pack-objects failed");
 
 	/*
 	 * We feed the pack-objects we just spawned with revision