Log Message:
Update monotone to 0.47:

Changes

- The default '<unknown>' author used by the git_export command has
  changed to 'Unknown <unknown>' and must be changed in existing author
  map files. The old '<unknown>' author will be rejected by the new
  validate_git_author lua hook.

- The 'git_export' command now validates all git author and committer
  values using a new 'validate_git_author' lua hook before they are
  written to the output stream. The export will fail if any value is
  rejected by this hook.

- The 'git_export' command now calls a new 'unmapped_git_author' lua
  hook for all git author values not found in the author map file. The
  default implementation of this hook attempts to produce valid git
  authors using several default pattern replacements.

- The 'get_date_format_spec' lua hook now has an additional parameter
  which hints at the wanted format (f.e. a short date or a long date
  time). The default implementation now returns '%x' for short and
  long dates, '%X' for short and long times (currently unused) and
  '%x %X' for short and long date times.

- The options '--date-format' and '--no-format-dates' are no longer
  specific to the 'log' command, but can now be used globally.

- monotone now prompts only three times for a key password.

New features

- Added portuguese translation (thanks to Américo Monteiro)

Bugs fixed

- 'passphrase' now allows an empty new password to be given
  (fixes monotone bug #28809)

- 'automate remote' and 'automate remote_stdio' no longer
  require an existing database (fixes monotone bug #28885)

- monotone no longer throws an exception on Windows if it is
  interrupted (^C); a couple of other bug have been fixed for this
  platform as well which generally improve the compatibility.

- The annotation of 'annotate' is now localized.

- The various occurrences where a revision is described by its
  certs now come with proper localized date output.

- Fix problems with newer Lua versions especially when
  LUA_COMPAT_VARARG not set.

Other

- Roster handling has been sped up significantly, and roster cache
  performance has been fixed for the case of overly large rosters.
  This should be mostly noticable when digging through history
  (especially initial pulls, since those send so many revisions),
  and be more noticable for projects with larger trees.

  The most significant internal change from this is that rosters and
  marking_maps are now copy-on-write. A longer overview of the internal
  changes is at:
  http://lists.gnu.org/archive/html/monotone-devel/2010-02/msg00043.html

- Improve the compatibility with newer Botan versions.