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- Security flaws in fetch, procfs, linprocfs, telnet, sendfile, ioctl, and cvs were fixed. These security fixes were already available to FreeBSD 5.3 users.
- The ULE process scheduler was fixed, and is now available as an alternative to the 4BSD scheduler.
- CPU frequency scaling functionality was added to the kernel.
- Several network card drivers were made multiprocessor-capable. One network driver was added to support USB Ethernet adapters. The Intel Pro/1000 and SysKonnect/Yukon LAN drivers were fixed.
- OpenBSD’s CARP protocol was implemented.
- The FreeBSD IP Firewall (ipfw) was updated with new options and features.
- Network devices can now be given aliases at boot time.
- BIND, netcat, Heimdal, OpenSSL, and Sendmail were updated to newer versions.
- Documentation was updated.
