Merge branch 'master' into v4.6.x

diff --cc po/de.po
Simple merge

diff --cc po/es.po
Simple merge

diff --cc po/it.po
Simple merge

diff --cc po/ru.po
Simple merge

diff --cc po/tr.po
Simple merge

diff --cc po/vi.po
Simple merge

diff --cc po/xboard.pot
index 8b4e621,e3612b3..c1175f6
--- 1/po/xboard.pot
--- 2/po/xboard.pot
+++ b/po/xboard.pot
@@@ -6,9 -6,9 +6,9 @@@
  #, fuzzy
  msgid ""
  msgstr ""
 -"Project-Id-Version: GNU xboard master-20110822\n"
 +"Project-Id-Version: GNU xboard 4.6.0.20111101\n"
  "Report-Msgid-Bugs-To: bug-xboard@gnu.org\n"
- "POT-Creation-Date: 2011-11-01 18:38-0700\n"
+ "POT-Creation-Date: 2011-12-03 08:07-0800\n"
  "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
  "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
  "Language-Team: LANGUAGE <LL@li.org>\n"

diff --cc po/zh_CN.po
Simple merge

diff --cc po/zh_HK.po
Simple merge

diff --cc po/zh_TW.po
Simple merge