Optimize StringUtils.trim() and remove StringUtils.equals()

Issue#702 Adding tests to show issue 702 is fixed.

Use predefined charsets instead of names where possible

Use AtomicIntegerArray and StandardCharsets

Fix some build checks in sources

* Trailing whitespace
* Wrong identation
* Long lines
* Line endings

Fix issue #740

Fix issue #736: Copyright years in sources

Fix #744: TestFile failure on Java 9 and Java 10

Fix suggested by Noel Grandin

More cleanups in LocalDateTimeUtils and other minor changes

Change REGEXP_REPLACE mode for MariaDB and PostgreSQL

Issue#646 NPE in CREATE VIEW WITH RECURSIVE & NON_RECURSIVE CTE