XtoW package has upset errors

[Christopher Faylor]

upset: *** /sourceware/ftp/pub/cygwin/x86_64/setup.ini: error - package XtoW 
requires nonexistent package rxvt-unicode-X
upset: *** /sourceware/ftp/pub/cygwin/x86_64/setup.ini: error - package XtoW 
requires package rxvt-unicode-X which has no "curr" binary
make: *** [/sourceware/ftp/pub/cygwin/x86_64/setup.ini] Error 1