=htc #16175 regard `raw-request-uri-header` setting
+htp #15933 import + improve SecurityDirectives (+ infrastructure) from spray
Merge pull request #16179 from spray/w/15933-import-security-directives

+htp #15933 import SecurityDirectives (+ infrastructure) from spray
+htp #15930 import RangeDirectives from spray
!htp #15656 split out scala-xml support into its own subproject
+pro #15917 provide SprayJsonSupport in akka-http-spray-json project

This will serve as an example of how to provide similar glue layers for
other JSON libraries.
+htc #16084 introduce CustomHeader superclass for user-defined headers
Merge pull request #16206 from spray/w/16175-regard-raw-request-uri-header-setting

=htc #16175 regard `raw-request-uri-header` setting
=pro optimize pull request validation for release-2.3-dev branch

 * enable parallel task execution for everything but tests
 * aggregate only streamAndHttp projects
 * disable publishing
 * don't run extra-build-steps

To be reverted before merging into release-2.3
=str centralize number of runs for randomized stream tests
=str don't run streams test twice because of junit.RunWith annotation
Merge pull request #16185 from spray/w/faster-PR-validation

optimize pull request validation for release-2.3-dev branch
Merge pull request #16195 from spray/w/15930-RangeDirectives

+htp #15930 import RangeDirectives from spray
Merge pull request #16205 from spray/w/15656-fine-grained-dependencies

http: #15656 #15917 split out and provide glue layers for scala xml and spray-json support
Merge pull request #16207 from spray/w/16084-CustomHeader-model

+htc #16084 introduce CustomHeader superclass for user-defined headers
add http-java project
wip