[Yum] yum-updatesd patch

[Nickolai Zeldovich]

I have been running into lots of problems with yum-updatesd ever since
installing Fedora Core 6, and this is apparently a fairly common
issue:

    https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=212507

After running "yum-updatesd -f" (v3.0.3), I found a number of places
where exceptions were thrown and yum locks not released (see attached
log files).  I don't understand the details of yum enough to figure
out why it's throwing these exceptions all over the place (the "Index
out of range" sounds like something else is definitely wrong), but the
attached patch at least catches and tries to log or handle them.

Empirically, yum-updatesd now no longer seems to hold the yum lock forever.

Nickolai.
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