Fixed a binary incompatibility between nova and core.

The function signature did not match, and therefore the stack would
get corrupted when calling the core function StartServer() from nova.
Merge pull request #742 from kacfengine/windowsFix

Fixed a binary incompatibility between nova and core.
Don't stat cf_null files when checking for new promises.
Merge pull request #743 from jimis/cf_null

Don't stat cf_null files when checking for new promises.
Merge pull request #741 from maciejpatucha/master

Fix failing test.
start soft-deprecate of am_policy_hub: policy server is the established name
Call tchdboptimize only in 1% of the OpenTokyoDatabase() calls

Even though we call non-reentrant rand() from multiple thread contexts,
there is no harm done even if bad random numbers are returned.
Fix grammar in mount message.

Fixes #2938
Report state of agent only in verbose mode.

Fixes #2821
Merge pull request #755 from jimis/blah2

Call tchdboptimize only in 1% of the OpenTokyoDatabase() calls