yum-rhn-plugin bug fix and enhancement update

An updated yum-rhn-plugin package that fixes several bugs is
now available.

yum-rhn-plugin allows yum to access a Red Hat Network server for software
updates.

This update fixes several bugs:

* the software updater (pup) did not parse OpenSSL error messages
correctly. Therefore, when it encountered an invalid or missing SSL
certificate, the updater would crash. The parsing code is now corrected,
so invalid or missing SSL certificate will not result in a crash.
(BZ#441738, BZ#481042)

* /etc/sysconfig/rhn/systemid stores the identity of a system registered
with the Red Hat Network. Previously, yum-rhn-plugin did not allow for
situations where this file was missing, so would cause yum to crash when
it could not find the file. If the systemid file is missing, the plugin
now warns the user that the SystemID could not be acquired and that the
system might not be registered on the Red Hat Network. (BZ#444581)

* previously, if yum itself was updated during an update transaction, the
version of yum running in memory might attempt to read a yum.conf file
that was updated for the new version of yum. If the new yum.conf file
were incompatible with the old version of yum, yum would crash and
the transaction would fail. Now, before running the transaction, yum
creates a YumBase object to hold the actions and associated parameters
that it will need during the transaction. By referring to this
object, yum does not need to obtain configuration information during the
transaction, and therefore avoids any incompatibility introduced by a
change in the yum.conf file. (BZ#448245)

* yum-rhn-plugin creates creates a file at
/var/spool/up2date/loginAuth.pkl that caches login information. If the
contents of this file were to become corrupt, attempts to log in would
result in a 404 error. Now, yum-rhn-plugin deletes this file at the end
of each transaction and creates a new copy the next time that yum is run.
Renewing this file ensures that cached login information is current and
uncorrupted. (BZ#465340,BZ#489396)

* previously, yum-rhn-plugin did not allow for situations where the
update agent sent a request to a Red Hat Network server, but received no
response within its timeout interval. This would generate an unhandled
exception that would crash the update agent. Now, if the update agent
does not receive a timely response from an RHN server, it will present
the user with an error message that says: "Server Unavailable. Please try
later". (BZ#467866)

* previously, while processing package removals, yum-rhn-plugin would not
take architecture information into account. Therefore, on a system where
a package was installed for more than one architecture, removing the
package for one architecture would remove the package for all
architectures. Yum-rhn-plugin now pays attention to the architecture of
the package that is to be removed, and removes the package for only
that architecture. (BZ#476899)

* yum-rhn-plugin did not account for missing dependencies while processing
scheduled package actions from RHN hosted or satellite servers. If a
dependency was missing in the channel, yum-rhn-plugin would report that
the package was installed successfully, even though it failed. Now,
yum-rhn-plugin notes missing dependencies, and correctly reports that
installation of a package failed due to dependency problems. (BZ#491127)

All users of yum-rhn-plugin are advised to upgrade to this updated package,
which resolves these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

441738 - Software Updater abnormally terminated when launched
444581 - yum should write: "missing file systemid" instead of traceback
448245 - updates failing on python bug
465340 - loginAuth.pkl should be removed on "yum clean all"
467866 - Redhat Software Updater Crash
476899 - Client not properly handling package arch for package removal
481042 - ssl connection timeout causes unhandled exception during satellite install
491127 - Kickstarting PV guest fails with unmet koan dependency: koan >= 1.4.2 is needed by package spacewalk-koan-0.1.10-1.el5sat.noarch