nnrss: handle unavailability of rss server more gracefully?

[Michael Schierl <schierlm-usenet@gmx.de>]

Hi,

today my emacs crashed (i.e. hanged) when fetching news. A few
edebug sessions later, i knew that the problem was in

mm-url-insert, which was called by an unreachable (timing out) host
name. wget (mm-url-program is `wget' here) seems to try to fetch the
file indefinitely (at least several minutes). So I thought the proper
way would be to do

(setq mm-url-predefined-programs 
'((wget "wget" "-T" "10" "-t" "1" "--user-agent=mm-url" "-q" "-O"
"-")))

to make wget fail after 10 seconds. However, this will signal an error
and this error prevents updating the rest of the groups.

As a workaround, I put nnrss: to Denied in the server buffer (this
allows me at least to fetch news from nntp server, but not the other
rss feeds).

Can I deny only one single RSS feed? And would it be possible for
nnrss to notice when a feed is down and fetch the others nevertheless?

Michael