+ * add the various foldmarkers in apt-pkg & cmdline (no code change)
+ * versions with a pin of -1 shouldn't be a candidate (Closes: #355237)
+ * prefer mmap as memory allocator in MMap instead of a static char
+ array which can (at least in theory) grow dynamic
+ * eliminate (hopefully all) segfaults in pkgcachegen.cc and mmap.cc
+ which can arise if cache doesn't fit into the mmap (Closes: #535218)
+ * display warnings instead of errors if the parts dirs doesn't exist