Fix Duct#append type parameter
Merge pull request #15384 from 13h3r/release-2.3-dev

Fix Duct#append type parameter
=str #15418: Fix NPE when stream is closed before having a connection actor
Merge pull request #15442 from drewhk/wip-15418-tcp-stream-npe-drewhk

=str #15418: Fix NPE when stream is closed before having a connection ac...
+pro Create aggregate project for pulishing stream/http-core/parsing
+pro,hco,par Make sure that things build on both 2.10 and 2.11
+pro,str #15379 Include persistence.stream in the published stream artifact
=pro Updated genjavadoc to version 0.8
+pro,doc Make sure that doc gets published during subproject release
+pro,hco Disable JavaDoc and revert breaking code changes
Merge pull request #15451 from akka/wip-fix-releasing-for-stream-http-ban

Changes needed to publish stream and http-core together with dependencies and docs.
=pro Publish empty parsing javadoc artifact for Sonatype

Sonatype demands that there is a javadoc artifact published for things to be propagated to maven properly.
+pro add akka-http project
Merge pull request #15518 from spray/w/create-akka-http

+pro add akka-http project
!str: #15474: Migrate to reactive-streams 0.4.0.M1
Merge pull request #15578 from drewhk/wip-15474-streams-migrate-spi-0.4-drewhk

Migrate streams to reactive-streams 0.4.M1
!scr do not remove tags (github) that are not set on an issue

Since the updated github issues views, it shows all "removed tags",
events in the issue even if the removed tag was never set on the issue.
So this script would always show up as "removed validating,needs-attention"
Even if the issue never had the label needs-attention set to it,
which is confusing visually.

This change introduces that we only remove tags that actually are set on
the issue.

Conflicts:
	scripts/build/github-tagging.sh
Merge pull request #15606 from ktoso/port-tagging-github-ktoso

!scr do not remove tags (github) that are not set on an issue (for Validation)
=bld #15616 Specifies UTF-8 as charset for the verification and wraps thrown exceptions including the offending file.
= str - #15618 - Renames Flow and Duct 'tee' operation to 'broadcast'