v0.0.6 — fix --judge flag, hang, and CI

Patch release: the --judge flag now works, the CLI no longer hangs after
checking, and the GitHub Actions CI is fixed. Also relicensed to MIT with a
reworked README and new contributor docs.

Fixed

• --judge now selects the proxy judge. It was parsed but ignored — every check
  ran against the AZEnv judge regardless of the flag, so the documented
  proxyjudge.us default never applied. An unknown judge name is now rejected
  with a non-zero exit (listing the valid names) and no proxies are checked.
• The CLI no longer hangs after processing all proxies. Action never closed its
  worker channel, so the worker goroutines never returned and the program blocked
  forever; the channel is now closed once the feed is exhausted.
• Rewrote the GitHub Actions workflows: pinned current Go versions, fixed the
  empty go-version in the lint job, and dropped the dead OS matrix.

Added

• ResolveJudge helper that looks a judge up in the Judges registry, and a
  NewApp constructor shared by the binary and the tests.
• CONTRIBUTING.md describing setup, the test/lint workflow, code style, and the
  commit/PR/release process.
• CHANGELOG.md, with reconstructed notes for the previously empty
  v0.0.1–v0.0.5 releases.

Changed

• Relicensed from the Apache License 2.0 to the MIT License, matching the other
  memclutter projects.
• Reworked README.md: description, status badges, install/usage, the
  tab-separated output format, a library-usage example, and a "how it works"
  explanation of judges and protocol probing.

Full changelog: v0.0.5...v0.0.6

v0.0.5

Added

• Second proxy judge ProxyjudgeUsJudge (http://proxyjudge.us/) alongside AZEnvPhpJudge, plus a Judges registry map keyed by judge name.
• golangci-lint and its GitHub Actions workflow.
• More tests around the judges and check engine.

Full changelog: v0.0.4...v0.0.5

v0.0.4

Added

• Tests for the Feed implementations.

Fixed

• Off-by-one bug in SliceFeed.Next that mis-tracked the current index.

Full changelog: v0.0.3...v0.0.4

v0.0.3

Changed

• Introduced base.go holding the core Feed and Judge interfaces (moved out of their previous files) and reformatted the package godoc.

Full changelog: v0.0.2...v0.0.3

v0.0.2

A full rewrite of the checker into a concurrent, judge-based engine.

Added

• Check(addr, judge) engine that probes each ip:port against all four protocols (http, https, socks4, socks5) and returns a CheckResult with the online flag, supported protocols, per-protocol errors, and speed.
• Judge abstraction (target URL + recommended timeout) with the AZEnvPhpJudge implementation.
• Reading proxies from a stdin stream in addition to command-line arguments.
• Concurrent checking via a worker pool sized by the --threads flag (default 10).
• GitHub Actions CI running the test suite with coverage uploaded to Codecov.

Changed

• Upgraded the CLI from urfave/cli v1 to v2 and moved the entry point to cmd/main.go.
• Proxy addresses are now plain ip:port (the tool tries every protocol) instead of requiring a scheme:// prefix.
• Output is now tab-separated addr<TAB>protocols<TAB>speed for working proxies.

Full changelog: v0.0.1...v0.0.2

v0.0.1

First release of proxycheck — a simple proxy list checker.

Added

• A urfave/cli v1 command that checks proxies supplied via repeatable --proxyAddr flags or a --proxyAddrFile list file.
• Per-scheme checking for http, https, socks4, and socks5 proxies (h12.io/socks for SOCKS), validating each against a --targetURL.
• Working proxy addresses printed to stdout; failures logged.