Changes in version 1.6.0 - 2018-05-23

Medium changes
- Update and adapt to metrics-lib 2.4.0.
- Replace Gson with Jackson.

Changes in version 1.5.1 - 2018-03-19

Medium changes
- Add the correct number of lines to sanitized webstats files.
Minor changes
- Add bastet to default list of directory authority fingerprints to download votes for.

Major changes
- Update to metrics-lib 2.2.0.
- Add new module for processing and sanitizing Tor web server logs.
Minor changes
- Exclude lastModifiedMillis in index.json.

Medium changes
- Handle bridge descriptors with an unusual order of "published" and "fingerprint" lines.
- Retain "bridge-distribution-request" lines when sanitizing descriptors.

Major changes
- Rename "Onionperf*" configuration options in collector.properties to "OnionPerf*" (with capital P).
- Add "Sync" as OnionPerfSource to synchronize .tpf files from other CollecTor instances.
Medium changes
- Add new optional "build_revision" field to index.json with the Git revision of the CollecTor instance's software used to create this file, which will be omitted if unknown.
Minor changes
- Remove all styling resources (fonts, CSS, etc.) from directory listings.

Major changes
- Update to metrics-lib 2.1.0 and to Java 8.
Medium changes
- When synchronizing descriptors from another CollecTor instance, keep annotations provided by the descriptor and only add the default annotation, when there was none.

Medium changes
- Fix a bug while sanitizing bridge network statuses without entries.

Major changes
- Download .tpf files from OnionPerf hosts.
- Stop downloading and merging .data and .extradata files from Torperf hosts.
- Update to metrics-lib 2.0.0.
- Update to Debian stretch libraries.
Medium changes
- Clean up files in recent/exit-lists/ again.
- Retain padding-counts lines in sanitized extra-info descriptors.
- Either include or retain "fingerprint" line in bridge network statuses with @type bridge-network-status 1.2.
- Set read timeouts for downloads from directory authorities and the exit list server.
Minor changes
- Only consider recent relay descriptors in reference checker.

Medium changes
- Unify the build process by adding git-submodule metrics-base in src/build and removing all centralized parts of the build process.
- Use the correct type annotation "@type tordnsel 1.0" for exit lists, rather than "@type torperf 1.0".

Medium changes
- Handle corrupt internal file used for checking references between descriptors by deleting and regenerating instead of escalating.
- Retain hidserv-* lines in sanitized extra-info descriptors.
- Sign .jar files again, and ensure they get signed in the build process.
Minor changes
- Add instructions and sample configuration for using nginx as HTTP server rather than Apache.

Major changes
- Provide a facility to synchronize descriptors from other CollecTor instances. If configured, the synchronization run collects recent descriptors from one or more remote CollecTor instances, verifies descriptors, and sorts them into the local descriptor store. Synchronization is implemented for relay descriptors (except microdescriptors), sanitized bridge descriptors, and exit lists.
Medium changes
- Replace four properties for configuring where to write descriptors by a single 'OutPath' property.
- Introduce *Sources and *Origins properties to simplify data source definition.
- Remove six properties for specifying what relay descriptors to download and replace them with hard-coded 'true' values.
Minor changes
- Add enum for descriptor type annotations.
- Add modular file persistence to write descriptors to the out/ and recent/ subdirectories..
- Exclude temporary files from index.json* files.
- Expand the operator's guide in INSTALL.md.

Medium changes
- Add support for Bifroest's bridge descriptor tarballs.
- Use a shutdown hook that gives currently running modules up to 10 minutes to finish properly, rather than killing them immediately.
- Replace TCP ports with hashes in @type bridge-network-status 1.1 and @type bridge-server-descriptor 1.2.
- Split up bridge descriptor tarballs into one tarball per month and descriptor type: bridge-statuses-YYYY-MM.tar.xz, bridge-server-descriptors-YYYY-MM.tar.xz and bridge-extra-infos-YYYY-MM.tar.xz.
- Keep "proto" lines in bridge server descriptors as introduced in proposal 264.
- Add tests for the bridgedescs module.
- Validate bridge tarballs from the bridge authority more rigorously.
Minor changes
- Remove quotes around base URL in index.json.
- Change default log thresholds from TRACE to INFO.
- Extend checkstyle to also check test sources.

Medium changes
- Avoid running out of memory when executing the relaydescs module repeatedly from the internal scheduler rather than using the system's cron daemon.

Major changes
- This is the initial release after over six and a half years of development.