Improvements to the command-line argument parsing in the

Improvements to the command-line argument parsing in the
command-line shell.  Command-line options can now occur either before
or after the database name and first command and are still accepted and
processed.  Command-line options are processed even if no database name
is given (and :memory: is assumed).

FossilOrigin-Name: 317c80cba3688a97ade9cde622cc3bd94cf3436a