Comment 11 for bug 942631

Pushed the following to the working branch:

commit 5f38884f0e9213c8830cfd9306775580c0a7c473
Author: Bill Erickson <email address hidden>
Date: Tue Feb 28 14:28:14 2012 -0500

    User Activity : SIP activity tracking

    1. Log user activity for all patron-related SIP actions, regardless of
    whether the SIP server verifies the user password.

    2. Determine the "ewho" (i.e. 3rd-party) value from configuration. Each
    SIP login <account> can now specify its own "activity_who" value.
    Additionally, a fall-through <activity_who> element can be added to the
    institution config.

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I also left a slot in the code where the activity_who value from the proposed SIP extension would be checked.