2.10 [KK 2008-09-02]
- Bugfix in host match mode. When a back end doesn't match anything,
  then the client isn't served. (Previously the dispatcher would fall
  back to least-connections over all known back ends.)
- In HTTP mode, a 502 error gets returned to the client when
  dispatching fails or when back end processing goes haywire. There is
  just one error page, 502 error header, 0 bytes content length.
- Implemented back end weights for least-connections dispatching.
- Bugfix in Backend::connect(): Socket gets closed when connecting fails.