Closes gh-25099

Closes gh-20336

Remove convenience Map that is to avoid. The only downside is that
getHandlerMethods requires a transformation but that should not be used frequently.

See gh-22961

Closes gh-22961

See gh-25373

This reverts commit 90467ba5.

Closes gh-25368 

Closes gh-25016

See gh-25016

Closes gh-24763

Closes gh-24872

Prior to this commit, a Profiles instance created via Profiles.of() was
not considered equivalent to another Profiles instance created via
Profiles.of() with the exact same expressions. This makes it difficult
to mock invocations of Environment#acceptsProfiles(Profiles) -- for
example, when using a mocking library such as Mockito.

This commit makes Profiles instances created via Profiles.of()
"comparable" by implementing equals() and hashCode() in ParsedProfiles.

Note, however, that equivalence is only guaranteed if the exact same
profile expression strings are supplied to Profiles.of(). In other
words, Profiles.of("A & B", "C | D") is equivalent to
Profiles.of("A & B", "C | D") and Profiles.of("C | D", "A & B"), but
Profiles.of("X & Y") is not equivalent to Profiles.of("X&Y") or
Profiles.of("Y & X").

Closes gh-25340

See gh-25357

This commit removes a redundant Character.toLowerCase() invocation in
BeanPropertyRowMapper.underscoreName().

Closes gh-25361

- fix formatting
- fix syntax
- use consistent example package name

This commit evolves the solution from M1 by parsing and caching patterns with the
target HandlerMapping's PathPatternParser. This makes it unnecessary for callers to
be aware of pattern parsing.

Closes gh-25312

Prior to this commit, SocketUtils used System.currentTimeMillis() for
the seed for the java.util.Random instance used internally. The use of
the milliseconds value returned by currentTimeMillis() can lead to
collisions for randomly selected free ports for tests executing in
parallel on the same computer.

This commit therefore switches to System.nanoTime() for the Random seed
used in SocketUtils in an attempt to avoid such collisions for tests
executing in parallel in different JVMs on the same computer.

Closes gh-25321

Closes gh-25352

Closes gh-25351

This commit makes sure that the StringHttpMessageConverter reads
input with "application/*+json" as Content-Type with the UTF-8
character set.

Closes gh-25328

Closes gh-25330

Closes gh-25344

This commit introduces support for writing JSON with an US-ASCII
character encoding in the Jackson encoder and message converter,
treating it like UTF-8.

See gh-25322

This commit introduces a way to change the PathPatternParser used in
PathPredicates, by way of a ChangePathPatternParserVisitor. This
visitor is used by both WebFluxConfigurationSupport and
WebMvcConfigurationSupport to make sure the configured parser is used.

Closes gh-23236

Closes gh-25338