* scandir.cc (scandir): Assume namelist is always valid, per POSIX.
	(CID 60021).
	* sec_auth.cc (cygwin_logon_user): Securely erase password copy.
	(lsaprivkeyauth): Avoid trying to dereference data if no key is stored
	in the registry (CID 60122).  Securely erase passwords after usage.
	* scandir.cc (scandir): Assume namelist is always valid, per POSIX.
	(CID 60021).
	* sec_auth.cc (cygwin_logon_user): Securely erase password copy.
	(lsaprivkeyauth): Avoid trying to dereference data if no key is stored
	in the registry (CID 60122).  Securely erase passwords after usage.
	* fhandler_floppy.cc (fhandler_dev_floppy::get_drive_info): Fix floppy
	drive handling broken with 1.7.19.
	* fhandler_floppy.cc (fhandler_dev_floppy::get_drive_info): Fix floppy
	drive handling broken with 1.7.19.
	* fhandler_proc.cc (format_proc_swaps): Use tmp_pathbuf for filename,
	rather than allocating and forgetting to free (CID 59982).
	* fhandler_proc.cc (format_proc_swaps): Use tmp_pathbuf for filename,
	rather than allocating and forgetting to free (CID 59982).
	* fhandler_process.cc (get_mem_values): Rearrange code slightly to
	avoid resource leakage (CID 59973).
	(format_process_stat): Drop temporary variable wcmd and avoid
	string copy without length check (CID 60050).
	(format_process_status): Ditto (CID 60051).
	* fhandler_process.cc (get_mem_values): Rearrange code slightly to
	avoid resource leakage (CID 59973).
	(format_process_stat): Drop temporary variable wcmd and avoid
	string copy without length check (CID 60050).
	(format_process_status): Ditto (CID 60051).
	* fhandler_procsysvipc.cc (format_procsysvipc_msg): Rearrange code to
	avoid resource leakage (CID 60002).  Don't use tmp_pathbuf, explain why.
	Fix indentation.
	(format_procsysvipc_sem): Ditto.
	(format_procsysvipc_shm): Ditto (CID 60003).
	* fhandler_procsysvipc.cc (format_procsysvipc_msg): Rearrange code to
	avoid resource leakage (CID 60002).  Don't use tmp_pathbuf, explain why.
	Fix indentation.
	(format_procsysvipc_sem): Ditto.
	(format_procsysvipc_shm): Ditto (CID 60003).
	* flock.cc (delete_lock_in_parent): Use LIST_FOREACH_SAFE to avoid
	dereferencing freed pointer (CID 60224).