Release 6.6 in Series 10

• Dropped node::info() method in favor on node::list() and iterating over its result querying app::info() methods for each application. This eliminates a race condition in node service vs. app service interaction and reduces code duplication a little.

Release 6.4 in Series 10

• Bugfix: do not try to destroy already destroyed channels, for example if both read() and write() queued a socket failure.

Release 6.3 in Series 10

• Core version can be obtained in runtime via config_t::version().
• Bugfix: do not crash on out-of-protocol messages from slaves.