Update formula to use spring-boot rather than springboot. This will
allow both taps to be used at the same time.

See gh-24659

Closes gh-24680

Update reference documentation to the new spring-io/homebrew-tap repo.

Closes gh-24659

Fixes gh-24168

Closes gh-24647

Closes gh-24647

See gh-24647

See gh-24647

* pr/24606:
  Polish "Return -1 port for non-listening WebServers"
  Return -1 port for non-listening WebServers

Closes gh-24606

See gh-24606

Update `WebServer` implementations to return -1 from `getPort()` if
the server  isn't listening on a port. This aligns the implementations
with the interface Javadoc.

See gh-24606

Update `OperationMethodParameter` to additionally support JSR-305 based
`@Nullable` annotations.

Closes gh-24647

* gh-24648:
  Exclude starters from Javadoc aggregation

Closes gh-24648

See gh-24648

* pr/24628:
  Polish "Remove unnecessary semicolon"
  Remove unnecessary semicolon

Closes gh-24628

See gh-24628

See gh-24628

The fix causes a Jersey application to fail in the absence
of a `CorsFilter` or `CorsConfigurationSource` bean.

See gh-11987

* pr/24625:
  Update copyrights to 2021

Closes gh-24625

See gh-24625

See gh-24604

Closes gh-24599

Closes gh-24596

Closes gh-24586

See gh-24453

* pr/24558:
  Polish

Closes gh-24558

See gh-24558

See gh-24205

Closes gh-24567

Closes gh-24205

Closes gh-24531

Closes gh-24560

See gh-18631

Rename "app" projects in `spring-boot-launch-script-tests` and
`spring-boot-loader-tests` to something unique.

See gh-18631

Update the jar `Handler` class to support a non-reflective fallback
mechanism when possible. The updated code attempts to capture a regular
jar URL before our handler is installed. It can then use that URL as
context when creating the a fallback URL. The JDK jar `Handler` will
be copied from the context URL to the fallback URL.

Without this commit, resolving new Tomcat URLs of the form
`jar:war:file:...` would result in an ugly "Illegal reflective access"
warning.

Fixes gh-18631

See gh-11987