Closes gh-17854

Closes gh-17842

Closes gh-17850

Closes gh-17698

Closes gh-17846

Closes gh-12874

Fixes gh-17845

Closes gh-17840

Closes gh-17835

Closes gh-17840

* pr/17835:
  Fix syntax errors in docs

Closes gh-17835

See gh-17835

* pr/17834:
  Simplify some code

Closes gh-17834

See gh-17834

Closes gh-17839

* pr/17825:
  Polish some Collections API calls

Closes gh-17825

See gh-17825

* pr/17827:
  Simplify for statement with Collection copy

Closes gh-17827

See gh-17827

* pr/17832:
  Simplify some code

Closes gh-17832

See gh-17832

Fixes gh-17798

Closes gh-17822

Closes gh-17795

Closes gh-17818

Closes gh-16704

Closes gh-17815

Closes gh-16853

This commit prevents a potential NPE if the startTime of the
MavenSession is not available and fallbacks to the current time. This
can happen when invoking the plugin with Maven embedded in an IDE.

Closes gh-17810

Closes gh-17813

* pr/17778:
  Polish "Configure a temporary directory with Undertow"
  Configure a temporary directory with Undertow

Closes gh-17778

See gh-17778

See gh-17778

* pr/17785:
  Polish "Simplify if statements"
  Simplify if statements

Closes gh-17785

See gh-17785

See gh-17785

* pr/17797:
  Harmonize Spring Session flush mode properties javadoc
  Add support for configuring Spring Session JDBC flush mode

Closes gh-17797