Update scmgit packages to 1.6.6.2.

Changes:
* recursive merge didn't correctly diagnose its own programming errors,
  and instead caused the caller to segfault.
* The new "smart http" aware clients probed the web servers to see if
  they support smart http, but did not fall back to dumb http transport
  correctly with some servers.
* Time based reflog syntax e.g. "@{yesterday}" didn't diagnose a misspelled
  time specification and instead assumed "@{now}".
* "git archive HEAD -- no-such-directory" produced an empty archive
  without complaining.
* "git blame -L start,end -- file" misbehaved when given a start that is
  larger than the number of lines in the file.
* "git checkout -m" didn't correctly call custom merge backend supplied
  by the end user.
* "git config -f <file>" misbehaved when run from a subdirectory.
* "git cvsserver" didn't like having regex metacharacters (e.g. '+') in
  CVSROOT environment.
* "git fast-import" did not correctly handle large blobs that may
  bust the pack size limit.
* "git gui" is supposed to work even when launched from inside a .git
  directory.
* "git gui" misbehaved when applying a hunk that ends with deletion.
* "git imap-send" did not honor imap.preformattedHTML as documented.
* "git log" family incorrectly showed the commit notes unconditionally by
  mistake, which was especially irritating when running "git log --oneline".
* "git status" shouldn't require an write access to the repository.
* Other minor documentation updates are included.

(minskim)