by making appropriate drupal_bootstrap() calls.  Bug 62942.

  per request of slave upon login.

  logged onto master. (database.inc stopped using sprintf()
  for escaping in revision 1.46 of HEAD, which became 4.7.)

* Specify HEAD.

* Add link to project page.

* Remove unneeded slashes when using url().
* Eliminate singlesignon_get_slave_uid(), only used once.
* Make code cleaner re setting of singlesignon_prior_sid.

# Tested and ready for Drupal 4.7.