Porcelain level "log" family should recurse when diffing.

Most notably, "git log --name-status" stopped at top level
directory changes without "-r" option.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: gitster

Documentation/git-log.txt

@@ -96,7 +96,7 @@ git log --since="2 weeks ago" \-- gitk::
 	The "--" is necessary to avoid confusion with the *branch* named
 	'gitk'
 
-git log -r --name-status release..test::
+git log --name-status release..test::
 
 	Show the commits that are in the "test" branch but not yet
 	in the "release" branch, along with the list of paths

Documentation/user-manual.txt

@@ -921,7 +921,7 @@ file such that it contained the given content either before or after the
 commit.  You can find out with this:
 
 -------------------------------------------------
-$  git log --raw -r --abbrev=40 --pretty=oneline -- filename |
+$  git log --raw --abbrev=40 --pretty=oneline -- filename |
 	grep -B 1 `git hash-object filename`
 -------------------------------------------------
 

builtin-log.c

@@ -55,6 +55,7 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix,
 	rev->abbrev = DEFAULT_ABBREV;
 	rev->commit_format = CMIT_FMT_DEFAULT;
 	rev->verbose_header = 1;
+	rev->diffopt.recursive = 1;
 	rev->show_root_diff = default_show_root;
 	rev->subject_prefix = fmt_patch_subject_prefix;
 	argc = setup_revisions(argc, argv, rev, "HEAD");
@@ -116,7 +117,6 @@ int cmd_whatchanged(int argc, const char **argv, const char *prefix)
 	git_config(git_log_config);
 	init_revisions(&rev, prefix);
 	rev.diff = 1;
-	rev.diffopt.recursive = 1;
 	rev.simplify_history = 0;
 	cmd_log_init(argc, argv, prefix, &rev);
 	if (!rev.diffopt.output_format)
@@ -165,7 +165,6 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 	git_config(git_log_config);
 	init_revisions(&rev, prefix);
 	rev.diff = 1;
-	rev.diffopt.recursive = 1;
 	rev.combine_merges = 1;
 	rev.dense_combined_merges = 1;
 	rev.always_show_header = 1;