Log Message:
bl3ify and upgrade to the latest stable version (2.0s2).

Changes since the previous version:

* Brought privacy lists into line with latest spec
* Fixed registration bug & password changing security hole
* Fixed DIGEST-MD5 "qop" attribute handling
* Fixed a number of c2s/s2s I/O race conditions
* Fixed keepalives (now work with SSL/TLS connections)
* Fixed build against OpenLDAP 2.2
* Updated presence broadcast semantics
* Added calls to PAM account management functions
* Added handling for zero-length LDAP passwords
* Added checks for Berkeley DB 4.2
* Added check for vsyslog() and workaround code for systems that don't 
  have it (eg HP-UX)
* Removed -R flags from link directives