histogram: check for duplicates when merging

Improves performance because it's not necessary to caculate the length
of the histogram on each insert.

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6570 71766da9-9752-0410-ab17-bfafa751c56a
histogram: remove find_largest_window

The function is not needed anymore and was primarily built for
educational purposes.

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6571 71766da9-9752-0410-ab17-bfafa751c56a
histogram: correctly merge duplicate values

- return the position in find_smallest_interval instead of the value
  which may not be unique

- merge the smallest interval using a position

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6572 71766da9-9752-0410-ab17-bfafa751c56a
remove opennebula support


git-svn-id: https://scalaris.googlecode.com/svn/trunk@6573 71766da9-9752-0410-ab17-bfafa751c56a
api_tx: avoid selective receive in rdht code to prepare for proto_sched usage.


git-svn-id: https://scalaris.googlecode.com/svn/trunk@6574 71766da9-9752-0410-ab17-bfafa751c56a
remove (obsolete) conpaas package

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6575 71766da9-9752-0410-ab17-bfafa751c56a
remove remaining opennebula targets and config options (missing in r6573)

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6576 71766da9-9752-0410-ab17-bfafa751c56a
gossip: Refactor triggering to avoid mpath infection
gossip_load: Improve new-round-without-convergence warning
gossip: Set FIRST_TRIGGER_DELAY to zero as default