Issue: SPR-10539

Prior to this commit, RestTemplate would not would
not accept IPv6 raw addresses in URLs because UriComponentsBuilder
would not parse/encode the Host part correctly.

The UriComponentsBuilder now parses and encode raw IPv6 addresses
in the "[1abc:2abc:3abc::5ABC:6abc]" format and also supports the
use of IPv6 scope_ids (see JDK8 java.net.Inet6Address),
like "[1abc:2abc:3abc::5ABC:6abc%eth0]".

Issue: SPR-10539

Issue: SPR-10647

Issue: SPR-10779

Issue: SPR-10398

Issue: SPR-10130

Issue: SPR-8108

Check for an empty fragment in UriComponentsBuilder.fromUriString(...)
to prevent the invocation of fragment(...).

Previously, UriComponentsBuilder.fromUriString(...) threw an exception
in the case of an empty fragment being provided (e.g. /example#).

Issue: SPR-10363

Fix HierarchicalUriComponents and OpaqueUriComponents .equals() methods.

Issue: SPR-10313

Before this change the presence of path params (e.g. "/foo;q=1/bar")
expected the request mapping to contain a URI variable in the place of
semicolon content (e.g. either "/{foo}/bar" or "/{foo};{fooParams}").

The change ensures path params are ignored in @RequestMapping patterns
so that "/foo/bar" matches to "/foo;q=1/bar" as well as
"/foo;q=1;p=2/bar".

Along with this change, the RequestMappingHandlerMapping no longer
defaults to having semicolon content removed from the URL, which means
@MatrixVariable is supported by default without the need for any
further configuration.

Issue: SPR-10234

Introducing a ServletContextPropertyUtils helper (analogous to SystemPropertyUtils) along the way.

Issue: SPR-10284

Add escaping for <, >, and PS/LS line terminators

Issue: SPR-9983

Refactor UriComponentsBuilder to ensure that paths do not contain empty
segments.

For example, prior to this commit:

    fromUriString("http://example.com/abc/").path("/x/y/z")

would build the URL "http://example.com/abc//x/y/z" where as it will
now build "http://example.com/abc/x/y/z".

Issue: SPR-10270

Update HierarchicalUriComponents.toUri() to only prepend a missing '/'
when the scheme, user info, host or port are specified. This makes
the toUri() method behave in the same way as .toUriString() and allows
relative URIs to be created.

Issue: SPR-10231

Fix UriComponentsBuilder to support query parameters that do not
include a value without losing '='. The following styles are now
supported:

    http://example.com/foo?bar=baz
    http://example.com/foo?bar=
    http://example.com/foo?bar

Issue: SPR-10215

(fix apache header copyright dates)

Issue: SPR-10266

Issue: SPR-10266

Issue: SPR-9983

Issue: SPR-10186

Issue: SPR-7763, SPR-10140, SPR-10132, SPR-10093, SPR-10103

Issue: SPR-10140

This reverts commit 45fa5082, reversing
changes made to a312d900.

Fix deprecation compiler warnings by refactoring code or applying
@SuppressWarnings("deprecation") annotations. JUnit tests of
internally deprecated classes are now themselves marked as
@Deprecated.

Numerous EasyMock deprecation warnings will remain until the
migration to mockito can be completed.

Issue: SPR-10130

Fix serialization warnings by applying @SuppressWarnings("serial")
when appropriate.

In certain cases and for unknown reasons, a correctly-placed
@SuppressWarnings("serial") annotation will fix the warning at the
javac level (i.e. the Gradle command-line), but will produce an
"unnecessary @SuppressWarnings" warning within Eclipse. In these
cases, a private static final serialVersionUID field has been added
with the default value of 1L.

Issue: SPR-10128

Issue: SPR-10127

  find . -type f -name "*.java" -or -name "*.aj" | \
    xargs perl -p -i -e "s/[ \t]*$//g" {} \;

Issue: SPR-10127