Store redirect information for ALL_SESSION and ALL_USER in a hash. This is a speedup if many of these exist (compared to checking a linked list for matches as before). Refactor a bit while here. Use the uthash code from Troy D. Hanson, http://troydhanson.github.com/uthash/

The digested changelog can be found under:
 contrib/debian/changelog
 
You can also find the exhaustive list of change using mercurial history, 
or at the following URL: http://www.freediameter.net/hg/freeDiameter/shortlog