Changes from 1.1.20 to 1.1.21

These changes are archived on ftp.crynwr.com:pub/kchanges and http://www.crynwr.com/kchanges. I cannot answer questions about Linux -- I merely summarize the kernel patches after reading them. I try to make them useful to everyone, but kernel hackers should take them with a grain of salt and read the patches themselves. The patch file is patch21.gz

• Keep track of the number of hard drives correctly.
• If we're timing out a character, reflect that on a select() for input.
• If the line discipline for a pty has no method for getting the characters in a buffer, pretend there are none (rather than crashing).
• If they're starting up a serial port as root, and it looks like there's no uart, just set an error bit rather than returning an error.
• Same thing for setting the IRQ, probably to fix something with ``setserial''.
• List of floppy tape support drives added.
• Kernel calls to request and free dma added.
• Don't unload a module if it's busy!
• Networking notes:
  • Small bug fix in the apricot xen-ii driver code (Mark Evans)
  • DE600 changes + DE620 driver (Bj0rn Eckwall)
  • WWW error return bug fixed (Everyone!)
  • SLIP default address is now better
  • Small changes to PLIP (Niibe)
  • Added PF_UNSPEC (Dominic Kubla)
  • TCP fastpath for receive.
  • Turbo charged tcp checksum routine (Arnt Gulbrandsen)
  • PPP locking bug fixes (Florian La Roche)

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