Merge branch 'maint'

* maint:
  http.c: Fix problem with repeated calls of http_init
  Add missing reference to GIT_COMMITTER_DATE in git-commit-tree documentation
  Fix import-tars fix.
  Update .mailmap with "Michael"
  Do not barf on too long action description
  Catch empty pathnames in trees during fsck
  Don't allow empty pathnames in fast-import
  import-tars: be nice to wrong directory modes
  git-svn: Added 'find-rev' command
  git shortlog documentation: add long options and fix a typo

fast-import.c

@@ -1199,6 +1199,8 @@ static int tree_content_set(
 		n = slash1 - p;
 	else
 		n = strlen(p);
+	if (!n)
+		die("Empty path component found in input");
 
 	for (i = 0; i < t->entry_count; i++) {
 		e = t->entries[i];