Merge branch 'maint-1.7.11' into maint

* maint-1.7.11:
  Almost 1.7.11.6
  gitweb: URL-decode $my_url/$my_uri when stripping PATH_INFO
  rebase -i: use full onto sha1 in reflog
  sh-setup: protect from exported IFS
  receive-pack: do not leak output from auto-gc to standard output
  t/t5400: demonstrate breakage caused by informational message from prune
  setup: clarify error messages for file/revisions ambiguity
  send-email: improve RFC2047 quote parsing
  fsck: detect null sha1 in tree entries
  do not write null sha1s to on-disk index
  diff: do not use null sha1 as a sentinel value

gitweb/gitweb.perl

@@ -54,6 +54,11 @@ sub evaluate_uri {
 	# to build the base URL ourselves:
 	our $path_info = decode_utf8($ENV{"PATH_INFO"});
 	if ($path_info) {
+		# $path_info has already been URL-decoded by the web server, but
+		# $my_url and $my_uri have not. URL-decode them so we can properly
+		# strip $path_info.
+		$my_url = unescape($my_url);
+		$my_uri = unescape($my_uri);
 		if ($my_url =~ s,\Q$path_info\E$,, &&
 		    $my_uri =~ s,\Q$path_info\E$,, &&
 		    defined $ENV{'SCRIPT_NAME'}) {