buffer; didn't worked at all. Reported by Thijmen Klok. From Werner on
stable branch.
* secmem.c (secmem_free, secmem_term): Use wipememory2() instead of
memset() to overwrite secure memory
* iobuf.c (direct_open): Handle mode 'b' if O_BINARY is available. From
Werner on stable branch.
* fileutil.c: Comment from stable branch.