See gh-16341

Closes gh-16364

Closes gh-16363

Closes gh-16362

Closes gh-16361

* pr/16341:
  Add missing class condition on thymeleaf-spring5

This commit adds an extra check for the presence of thymeleaf-spring5
library on the classpath. ThymeleafAutoConfiguration is now only
considered if both thymeleaf-spring5 and thymeleaf jars are present.

Closes gh-16341

* gh-16320:
  Polish "Use HTTPS for external links wherever possible"
  Use HTTPS for external links wherever possible

Closes gh-16320

See gh-16320

See gh-16320

* gh-16319:
  Polish "Use HTTPS for external links wherever possible"
  Use HTTPS for external links wherever possible

See gh-16319

See gh-16319

See gh-16316

* gh-16318:
  Polish "Use HTTPS for external links wherever possible"
  Use HTTPS for external links wherever possible

See gh-16381

See gh-16318

* gh-16317:
  Polish "Use HTTPS for external links wherever possible"
  Use HTTPS for external links wherever possible

Closes gh-16317

See gh-16317

See gh-16317

See gh-16316

* gh-16316:
  Polish "Use HTTPS for external links wherever possible"
  Use HTTPS for external links wherever possible

Closes gh-16316

See gh-16316

See gh-16316

Closes gh-16268

See gh-16268

Closes gh-16329

* gh-16314:
  Use HTTPS for external links from XML files where possible

Closes gh-16314