we dont want to rotate this file (already fixed in 3.x)

dont rotate radutmp out of the way - its not a log, its a state.
dded rfc6677.txt to the repository

..matching recent 3.x update
Merge pull request #226 from alanbuxey/v2.x.x

added rfc6677.txt to doc/rfc repository and fix redhat logrotate script for utmp