Closes gh-22564

See gh-22577

Prior to this commit, the PDF version of the Spring Reference Manual
contained HTML <strong></strong> tags in code examples due to the fact
that Asciidoctor converts bold formatting (i.e., elements wrapped in
`**` or `*`) within source code blocks into HTML tags even for PDF
rendering.

This commit addresses this issue by removing all bold formatting from
example code blocks.

Closes gh-22577

Closes gh-22522

This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).

# Fixed URLs

## Fixed But Review Recommended
These URLs were fixed, but the https status was not OK. However, the https status was the same as the http request or http redirected to an https URL, so they were migrated. Your review is recommended.

* http://quartz-scheduler.org/api/2.2.1/ (301) migrated to:
  https://www.quartz-scheduler.org/api/2.2.1/ ([https](https://quartz-scheduler.org/api/2.2.1/) result 404).

## Fixed Success
These URLs were fixed successfully.

* http://docs.jboss.org/jbossas/javadoc/4.0.5/connector/ migrated to:
  https://docs.jboss.org/jbossas/javadoc/4.0.5/connector/ ([https](https://docs.jboss.org/jbossas/javadoc/4.0.5/connector/) result 200).
* http://docs.jboss.org/jbossas/javadoc/7.1.2.Final/ migrated to:
  https://docs.jboss.org/jbossas/javadoc/7.1.2.Final/ ([https](https://docs.jboss.org/jbossas/javadoc/7.1.2.Final/) result 200).
* http://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/ migrated to:
  https://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/ ([https](https://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/) result 200).
* http://docs.oracle.com/javaee/7/api/ migrated to:
  https://docs.oracle.com/javaee/7/api/ ([https](https://docs.oracle.com/javaee/7/api/) result 200).
* http://docs.oracle.com/javase/8/docs/api/ migrated to:
  https://docs.oracle.com/javase/8/docs/api/ ([https](https://docs.oracle.com/javase/8/docs/api/) result 200).
* http://fasterxml.github.io/jackson-core/javadoc/2.9/ migrated to:
  https://fasterxml.github.io/jackson-core/javadoc/2.9/ ([https](https://fasterxml.github.io/jackson-core/javadoc/2.9/) result 200).
* http://fasterxml.github.io/jackson-databind/javadoc/2.9/ migrated to:
  https://fasterxml.github.io/jackson-databind/javadoc/2.9/ ([https](https://fasterxml.github.io/jackson-databind/javadoc/2.9/) result 200).
* http://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.9/ migrated to:
  https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.9/ ([https](https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.9/) result 200).
* http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/ migrated to:
  https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/ ([https](https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/) result 200).
* http://issues.gradle.org/browse/GRADLE-1116 migrated to:
  https://issues.gradle.org/browse/GRADLE-1116 ([https](https://issues.gradle.org/browse/GRADLE-1116) result 200).
* http://projectreactor.io/docs/core/release/api/ migrated to:
  https://projectreactor.io/docs/core/release/api/ ([https](https://projectreactor.io/docs/core/release/api/) result 200).
* http://tiles.apache.org/framework/apidocs/ migrated to:
  https://tiles.apache.org/framework/apidocs/ ([https](https://tiles.apache.org/framework/apidocs/) result 200).
* http://tiles.apache.org/tiles-request/apidocs/ migrated to:
  https://tiles.apache.org/tiles-request/apidocs/ ([https](https://tiles.apache.org/tiles-request/apidocs/) result 200).
* http://www.apache.org/licenses/LICENSE-2.0 migrated to:
  https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).
* http://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/ migrated to:
  https://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/ ([https](https://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/) result 200).
* http://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/ migrated to:
  https://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/ ([https](https://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/) result 200).
* http://docs.spring.io/spring-framework/docs migrated to:
  https://docs.spring.io/spring-framework/docs ([https](https://docs.spring.io/spring-framework/docs) result 301).
* http://glassfish.java.net/nonav/docs/v3/api/ migrated to:
  https://glassfish.java.net/nonav/docs/v3/api/ ([https](https://glassfish.java.net/nonav/docs/v3/api/) result 301).
* http://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.javadoc.doc/web/apidocs/ migrated to:
  https://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.javadoc.doc/web/apidocs/ ([https](https://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.javadoc.doc/web/apidocs/) result 301).
* http://projects.spring.io/spring-framework migrated to:
  https://projects.spring.io/spring-framework ([https](https://projects.spring.io/spring-framework) result 301).
* http://springframework.org/schema migrated to:
  https://springframework.org/schema ([https](https://springframework.org/schema) result 301).
* http://ehcache.org/apidocs/2.10.4 (301) migrated to:
  https://www.ehcache.org/apidocs/2.10.4 ([https](https://ehcache.org/apidocs/2.10.4) result 301).

* pr/22572:
  Polish "Align RdbmsOperation javadoc with jdbcTemplate defaults"
  Align RdbmsOperation javadoc with jdbcTemplate defaults

Closes gh-22572

See gh-22572

Closes gh-22544

See gh-22394

Closes gh-22547

Includes Mockito 2.25, Undertow 2.0.19, OpenPDF 1.2.10, JRuby 9.2.6.

See gh-22504

Closes gh-22504

See gh-22510

Includes removal of outdated Spring 1.2/2.0 references.

Closes gh-22429

Closes gh-22510

Closes gh-22507

Prior to this commit, repeated calls to `DataBuffer.write(CharSequence,
Charset)` would not write the given chars to the expected position in
the original buffer.

This commit fixes that by writing to the `outBuffer.position()`, offset
by the current `DataBuffer.writePosition()`.

Fixes gh-22484

* pr/22500:
  Fix typo in `my-property'

Closes gh-22500

Closes gh-22416

Closes gh-22491

Closes gh-22409

* pr/22482:
  Polish

Closes gh-22482

Closes gh-22473

Closes gh-22468

Closes gh-22449