Implemented "CQ DX " by disguising it as callsign "CQ9DX ".

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2791 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/unpackmsg.f90

@@ -96,5 +96,8 @@ subroutine unpackmsg(dat,msg)
      msg(j:j)=' '
   endif
 
-100 return
+100 continue
+  if(msg(1:6).eq.'CQ9DX ') msg(3:3)=' '
+
+  return
 end subroutine unpackmsg