[9fans] rtl8139 woes

[Richard C Bilson <rcbilson@plg2.math.uwaterloo.ca>]

I was hoping to get through the install without needing to ask for help,
and I succeeded -- I was especially impressed by how easy it was to
download the distribution over the network (through a rtl8139 connected
to a cable modem).

Then I tried to start the network.  No luck.  My cable provider gives
all net configuration through DHCP, which was enough to configure
WinXP, Debian, and the Plan 9 install without any further thought.
Uncommenting the ip/ipconfig line in /rc/bin/termrc didn't enable the
network.  Running ip/ipconfig on its own reports:

	ip/ipconfig: binding device: '/net/ether0' cs: file does not exist

and, indeed, there is no /net/ether0 file.

Adding "ether0=type=rtl8139" to /n/9fat/plan9.ini doesn't fix the problem,
but when I do this the boot process does print "ether#0 : rtl8139
: port..."  along with various configuration information that looks
basically correct.  This is the line that prints before "found 9pcdisk".

I haven't yet edited my /lib/ndb/local file to describe the local
interface, since it seems that most of the information I would specify
there ought to be obtained from DHCP -- I'm trying to set the system
up stand-alone (no cpu, auth, fs).  I don't know if I'm right here --
reading the Wiki didn't really clear this up for me.

Any help will be greatly appreciated.

- Richard