)

`ContextRunnable` is a new abstraction for the context passing.

It implements newly introduced `ContextAware` interface and
forces the implementors to provide a context (either current or empty).

old `Runnable`-based methods are marked as `@Deprecated` to
enforce the usage of the `ContextRunnable`.

# Conflicts:
#	reactor-core/src/main/java/reactor/core/CorePublisher.java
#	reactor-core/src/main/java/reactor/core/publisher/Flux.java
#	reactor-core/src/main/java/reactor/core/publisher/Mono.java
#	reactor-core/src/main/java/reactor/core/publisher/ParallelFlux.java

This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).

# Fixed URLs

## Fixed Success 
These URLs were switched to an https URL with a 2xx status. While the status was successful, your review is still recommended.

* http://github.com/reactor with 1 occurrences migrated to:  
  https://github.com/reactor ([https](https://github.com/reactor) result 200).
* http://projectreactor.io/docs/core/release/api/ with 3 occurrences migrated to:  
  https://projectreactor.io/docs/core/release/api/ ([https](https://projectreactor.io/docs/core/release/api/) result 200).
* http://projectreactor.io/docs/test/release/api/ with 1 occurrences migrated to:  
  https://projectreactor.io/docs/test/release/api/ ([https](https://projectreactor.io/docs/test/release/api/) result 200).
* http://www.apache.org/licenses/LICENSE-2.0 with 6 occurrences migrated to:  
  https://www.apache.org/licenses/LICENSE-2.0 ([https](https://www.apache.org/licenses/LICENSE-2.0) result 200).
* http://www.apache.org/licenses/LICENSE-2.0.txt with 1 occurrences migrated to:  
  https://www.apache.org/licenses/LICENSE-2.0.txt ([https](https://www.apache.org/licenses/LICENSE-2.0.txt) result 200).
* http://www.reactive-streams.org/reactive-streams-1.0.2-javadoc/ with 3 occurrences migrated to:  
  https://www.reactive-streams.org/reactive-streams-1.0.2-javadoc/ ([https](https://www.reactive-streams.org/reactive-streams-1.0.2-javadoc/) result 200).
* http://repo.spring.io/libs-milestone with 1 occurrences migrated to:  
  https://repo.spring.io/libs-milestone ([https](https://repo.spring.io/libs-milestone) result 302).
* http://repo.spring.io/libs-snapshot with 1 occurrences migrated to:  
  https://repo.spring.io/libs-snapshot ([https](https://repo.spring.io/libs-snapshot) result 302).
* http://repo.spring.io/plugins-release with 1 occurrences migrated to:  
  https://repo.spring.io/plugins-release ([https](https://repo.spring.io/plugins-release) result 302).