o Minor bugfixes (log message reduction)
   - Fix a path state issue that triggered a notice during relay startup.
     Fixes bug #8320; bugfix on 0.2.4.10-alpha.
   - Reduce occurrences of warns about circuit purpose in
     connection_ap_expire_building(). Fixes bug #8477; bugfix on
     0.2.4.11-alpha.
   - Fix a directory authority warn caused when we have a large amount
     of badexit bandwidth.  Fixes bug #8419; bugfix on 0.2.2.10-alpha.
   - Reduce a path bias length check notice log to info. The notice
     is triggered when creating controller circuits. Fixes bug #8196;
     bugfix on 0.2.4.8-alpha.