Merge r427172 from trunk:

Add in a very simple balancer "set" concept, which allows
for members to be assigned to a particular cluster set
such that members in lower-numbered sets are checked/used
before those in higher ones.

Also bundled in this are some HTML cleanups for the balancer
manager UI. Sorry for the mixins :)

Compiles/builds clean: passes test framework as well
as more normal usage tests ;)

Reviewed by: jim
Merge r427368, r428352, r428361, r432352 from trunk:

Reset standby flags for each loop through the cluster sets


Initialization change. Move to a different format
to force resets as well as a common technique, in case
_route is updated at some point.


Update docs for proxy:

  1. Put params in abc order
  2. Add hot-standby example
  3. Add in new features that hadn't been documented yet (lbset, ...)

Reviewed by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@440800 13f79535-47bb-0310-9956-ffa450edef68