Update from 3.10.13 -> 3.10.15

• Fix for lost config files during "portupgrade apcupsd" (PR ports/67251)
• Mandrake 10 USB users, please note, you must either use devfs to access the USB or reconfigure your kernel and turn CONFIG_USB_DYNAMIC_MINORS off.
• The NIS slave server code (net driver) should be much more efficient and robust than previous versions.
• The code as a whole is much more resistant to buffer overflows since most all string copies are now protected.

PR: 67251
Submitted by: Rob <robbyrnes@fastmail.com.au>