docs: prepare changelog for 42.2.3 release

CHANGELOG.md

@@ -7,6 +7,20 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
### Changed
- Reduce the severity of the erorr log messages when an exception is re-thrown. The error will be 
thrown to caller to be dealt with so no need to log at this verbosity by pgjdbc  [PR 1187](https://github.com/pgjdbc/pgjdbc/pull/1187)
- Deprecate Fastpath API [PR 903](https://github.com/pgjdbc/pgjdbc/pull/903)
- Support parenthesis in {oj ...} JDBC escape syntax [PR 1204](https://github.com/pgjdbc/pgjdbc/pull/1204)
- ubenchmark module moved pgjdbc/benchmarks repository due to licensing issues [PR 1215](https://github.com/pgjdbc/pgjdbc/pull/1215)
- Include section on how to submit a bug report in CONTRIBUTING.md [PR 951](https://github.com/pgjdbc/pgjdbc/pull/951)

### Fixed
- getString for PGObject-based types returned "null" string instead of null [PR 1154](https://github.com/pgjdbc/pgjdbc/pull/1154)
- Field metadata cache can be disabled via databaseMetadataCacheFields=0 [PR 1052](https://github.com/pgjdbc/pgjdbc/pull/1152)
- Properly encode special symbols in passwords in BaseDataSource [PR 1201](https://github.com/pgjdbc/pgjdbc/pull/1201)
- Adjust date, hour, minute, second when rounding nanosecond part of a timestamp [PR 1212](https://github.com/pgjdbc/pgjdbc/pull/1212)
- perf: reduce memory allocations in query cache [PR 1227](https://github.com/pgjdbc/pgjdbc/pull/1227)
- perf: reduce memory allocations in SQL parser [PR 1230](https://github.com/pgjdbc/pgjdbc/pull/1230), [PR 1233](https://github.com/pgjdbc/pgjdbc/pull/1233)
- Encode URL parameters in BaseDataSource [PR 1201](https://github.com/pgjdbc/pgjdbc/pull/1201)
- Improve JavaDoc formatting [PR 1236](https://github.com/pgjdbc/pgjdbc/pull/1236)

## [42.2.2] (2018-03-15)
### Added
@@ -20,7 +34,6 @@ thrown to caller to be dealt with so no need to log at this verbosity by pgjdbc
- Wrong results when single statement is used with different bind types[PR 1137](https://github.com/pgjdbc/pgjdbc/pull/1137)
- Support generated keys for WITH queries that miss RETURNING [PR 1138](https://github.com/pgjdbc/pgjdbc/pull/1138)
- Support generated keys when INSERT/UPDATE/DELETE keyword is followed by a comment [PR 1138](https://github.com/pgjdbc/pgjdbc/pull/1138)
- Properly encode special symbols in passwords in BaseDataSource [PR 1201](https://github.com/pgjdbc/pgjdbc/pull/1201)

## [42.2.1] (2018-01-25)
### Known issues
@@ -56,6 +69,7 @@ thrown to caller to be dealt with so no need to log at this verbosity by pgjdbc
- Use 'time with timezone' and 'timestamp with timezone' as is and ignore the user provided Calendars, 'time' and 'timestamp' work as earlier except "00:00:00" now maps to 1970-01-01 and "24:00:00" uses the system provided Calendar ignoring the user-provided one [PR 1053](https://github.com/pgjdbc/pgjdbc/pull/1053)
- Change behaviour of multihost connection. The new behaviour is to try all secondaries first before trying the master [PR 844](https://github.com/pgjdbc/pgjdbc/pull/844).
- Avoid reflective access to TimeZone.defaultTimeZone in Java 9+ [PR 1002](https://github.com/pgjdbc/pgjdbc/pull/1002) fixes [Issue 986](https://github.com/pgjdbc/pgjdbc/issues/986)

### Fixed
- Make warnings available as soon as they are received from the server. This is useful for long running queries, where it can be beneficial to know about a warning before the query completes. [PR 857](https://github.com/pgjdbc/pgjdbc/pull/857)
- Use 00:00:00 and 24:00:00 for LocalTime.MIN/MAX. [PR 992](https://github.com/pgjdbc/pgjdbc/pull/992)