Merge branch 'maint'

* maint:
  format-patch: add MIME-Version header when we add content-type.
  Fixed link in user-manual
  import-tars: Use the "Link indicator" to identify directories
  git name-rev writes beyond the end of malloc() with large generations
  Documentation/branch: fix small typo in -D example

git-compat-util.h

@@ -21,6 +21,9 @@
 
 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
 
+/* Approximation of the length of the decimal representation of this type. */
+#define decimal_length(x)	((int)(sizeof(x) * 2.56 + 0.5) + 1)
+
 #if !defined(__APPLE__) && !defined(__FreeBSD__)
 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */