+ * apt-pkg/deb/debmetaindex.cc:
+ - none is a separator, not a language: no need for Index (Closes: #624218)
+ * apt-pkg/aptconfiguration.cc:
+ - do not builtin languages only if none is forced (Closes: #643787)
+ * apt-pkg/pkgcachegen.cc:
+ - refactor MergeList by creating -Group, -Package and -Version specialist