GRIFFIN: "case" implementation for strings - in a hurry to support client tomorrow. This only manually tested. Unit tests to follow.

PG: QuestDB query system supports PG-style bind variables '?' alongside named bind variables ':name'

PG: in QuestDB blob size is limited to 64bit signed int. On PostgreSQL wire protocol blob is 32bit. In order to handle querying massive blobs using PostgreSQL approach we need to gracefully fail query that attempts to fetch oversized blob. This commit implements required behaviour

PG: result set can now be split across multiple send buffers. In other words small send buffer can support large result sets.

PG: send flow control is good, we need to test send flow control on every new feature we add though. Next is to send query result using undersized buffer.

PG: non-blocking server, receive flow control, working tests. I still need to test send flow control.

FIX: bugfix Number.appendHex, this was producing single digits for small numbers. Test for straw man WireParser that would allow to stress test network behaviour

NET: provisional implementation of JsonQueryProcessor - this processor returns query results as json. It is not fully tested yet, but basics are working.

NET: refactored common dispatcher logic into superclass. Fixed couple of places where log was allocated but not sent, this was breaking logging quite significantly

NET: async disconnect, disconnects must be done by the same thread that accepts new connections. Windows dispatcher implementation. Refactored common dispatcher code into super class

NET: async disconnect, disconnects must be done by the same thread that accepts new connections. Linux dispatcher implementation

NET: async disconnect, disconnects must be done by the same thread that accepts new connections. Linux dispatcher implementation

Misc: fixed similar network errors in Windows. Removed duplicate NetFacade. Replaced usages of Os.errno() with interface.

fix: network send() and recv() on Linux do not handle errors correctly, which sometimes results in broken wire protocols.