Always blow up on I/O failures when committing a transaction. #6153
Always blow up on I/O failures when committing a transaction. #6153

Previously, the ClassAd log silently ignored write failures for
nondurable transactions. This makes recovery impossible, as we only
tolerate bad data at the very end of the log file.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor