libiconv:
 * revise transliteration patch
 * refs [http://www.ip-phone-forum.de/showthread.php?t=267513 this thread]
 * TODO: make transliteration support optional as it increases the size of libiconv by about 50kb


git-svn-id: file:///var/svn/freetz/trunk@11754 149334a1-2f27-0410-a3b9-fc62619ac1e6