Description of problem:

option -C is described as "run entirely from cache, don't update cache"
but e.g.
yum -C info xterm
first connects to some network repositories. This behaviour is quite anoying on
slow connection and it would also be nice if I could query the package cache
when I am offline.

The same holds for the "search" command.

Version-Release number of selected component (if applicable):
yum-3.0.3-1.fc6

How reproducible:
allways

Steps to Reproduce:
1. yum -C info <anypackage>
2. watch network usage

or
1. disconnect from network
2. yum -C info <anypackage>
  
Actual results:

yum initiates some network communicaiton. When offline, error message appears:

Loading "installonlyn" plugin
Setting up repositories
Could not retrieve mirrorlist
http://mirrors.fedoraproject.org/mirrorlist?repo=core-6&arch=i386 error was
[Errno 4] IOError: <urlopen error (111, 'Connection refused')>
Error: Cannot find a valid baseurl for repo: core

Expected results:

yom should work without network communication when invoked with the option -C

Additional info: