allow using expired values while the source of a cache dictionary doesn't respond;
clone the source after an error to reset connections;
don't ask the source for a little time after error;
show the last exception in system.dictionaries for a cache dictionary too.

* Print better offsets on commit
* Stop consumption on the read buffer level
* Don't use cancellation in the middle of copyData()
* Add test
* Disable squashing stream for Kafka materialized views
* Commit last read message, since rdkafka auto-modifies offset

Fix for data race in StorageMerge

Fix extracting a Tuple from JSON

Fix build with internal libc++

Fix segmentation fault in vertical merge with skip indices

* Fix shared build
* Major default libs refactor
* Fix build with gcc_eh
* Link all libraries as a big group.
* Use global interface library as a group
* Build capnproto using our cmake
* Use only internal libunwind

Test for #4858

Atomicity of Replicated table removal.

Set default value of "queue_max_wait_ms" to zero, because current value makes no sense

Avoid possible deadlock in TRUNCATE of Replicated table.

JOINs with not nullable types and join_use_nulls=1

Disable Poco::AbstractConfiguration substitutions in query in clickhouse-client

Formatting changes for StringHashMap PR #5417.

Disable consecutive key optimization for UInt8/16 LowCardinality columns.