p1: /v2/scrape, /v1/fetch, auth, CLI, contract tests

Single Fetcher.Fetch on the Guard that holds DenyPrefixes. skipTlsVerification
is ignored. No 502. keys add writes the secret only to --out. Release binary
has no -test-allow-prefix.

vendor/github.com/go-shiori/go-readability/internal/re2go/grab-article.re

@@ -0,0 +1,61 @@
+/*!include:re2c "base.re" */
+
+// Original pattern: (?i)-ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote
+func IsUnlikelyCandidates(input string) bool {
+	var cursor, marker int
+	input += string(rune(0)) // add terminating null
+	limit := len(input) - 1  // limit points at the terminating null
+	_ = marker
+
+	for { /*!use:re2c:base_template
+		re2c:case-insensitive = 1;
+
+		unlikely = -ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote;
+
+		{unlikely} { return true }
+		*          { continue }
+		$          { return false }
+		*/
+	}
+}
+
+// Original pattern: (?i)and|article|body|column|content|main|shadow
+func MaybeItsACandidate(input string) bool {
+	var cursor, marker int
+	input += string(rune(0)) // add terminating null
+	limit := len(input) - 1  // limit points at the terminating null
+	_ = marker
+
+	for { /*!use:re2c:base_template
+		re2c:case-insensitive = 1;
+
+		maybe = and|article|body|column|content|main|shadow;
+
+		{maybe} { return true }
+		*       { continue }
+		$       { return false }
+		*/
+	}
+}
+
+// Commas as used in Latin, Sindhi, Chinese and various other scripts.
+// see: https://en.wikipedia.org/wiki/Comma#Comma_variants
+// Original pattern: \u002C|\u060C|\uFE50|\uFE10|\uFE11|\u2E41|\u2E34|\u2E32|\uFF0C
+func CountCommas(input string) int {
+	var count int
+	var cursor, marker int
+	input += string(rune(0)) // add terminating null
+	limit := len(input) - 1  // limit points at the terminating null
+	_ = marker
+
+	for { /*!use:re2c:base_template
+		re2c:case-insensitive = 1;
+
+		commas = [\u002C\u060C\uFE50\uFE10\uFE11\u2E41\u2E34\u2E32\uFF0C];
+
+		{commas} { count++; continue }
+		*        { continue }
+		$        { return count }
+		*/
+	}
+}