Introduced DependencyCycle structure to report cyclic dependencies in CollectResult and DependencyResult

Updated maven-bundle-plugin configuration to export internal packages as well, using x-internal:=true directive

Tweaked configuration for maven-bundle-plugin to produce versioned package imports for org.apache.http.** in manifest

Bug 422413 - Simplify creation of remote repositories that employ the session's auth/proxy configuration

Added newResolutionRepositories() and newDeploymentRepository() to RepositorySystem API

Introduced config property aether.connector.persistedChecksums=true|false to control persisting of checksums

Introduced ChecksumPolicy SPI for repository connectors to consult for checksum validation

Simple refactoring transformations without logic change

Actual flow of code is somehow becoming visible. I wonder how things got this bad....

Extracted method and got rid of outer label/continue statement

Bug 419314 - Allow to determine whether artifact/metadata resolution exceptions have been played back from the error cache

Added isFromCache() property to (Artifact|Metadata)TransferException

Made PathRecordingDependencyVisitor stop traversal upon cycle entry, also added test to verify NearestVersionSelector's usage of PathRecordingDependencyVisitor does not suffer from cycle-related issues either

Made DefaultUpdateCheckManager support aether.updateCheckManager.sessionState configuration property to bypass or disable in-session state