odd severities in bugzilla

[jbuck@welsh-buck.org]

I was doing some research to answer some questions RMS had about bug
tracking, and I see some odd things: we have two bugs (24998 and 25438)
with Severity="blocker" and Priority="P5".  This seems incoherent,
as do other uses of Severity="blocker".  I had thought that this
designation was reserved for bugs that prevent a release (meaning
that the RM, or in rare cases the SC, would mark a bug that way).

But I found a log entry from Wolfgang saying 

* Replace use of outdated severity "blocker" with "critical".

So, are we using "P1" instead to mark release-blocking bugs?  Should
we fix the severities of existing bugs?