vlog configuration changes:

- rename ConfigureLogger to Configure
- Configure now keeps track of whether the logger has already
  been configured and will return an error if Configure is
  called more than once.
- Configure can be forced to override a prior configuration
  by passing the 'OverridePriorConfiguration' option.

MultiPart: 1/3

Change-Id: I7af1035faeec13eafd64cbae27c5ffe6a9128775
6 files changed
tree: 6558eef555921967eea057b8d45974f047b18164
  1. cmdline/
  2. dbutil/
  3. textutil/
  4. toposort/
  5. vlog/
  6. .gitignore