Inconsistency in parameters for specifying a log directory

There are some binaries, like fdbcli, that accept a log directory through the `--log-dir` parameter. There are other binaries, like fdbserver, that accept a log directory through the `--logdir` parameter. I can't seem to remember which is which reliably, so I have to look it up whenever I want to run a one-off command with logs captured. Can we standardize the formatting for this parameter?