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/JohannesKaufmann/html-to-markdown/v2/internal/domutils/domutils.go

@@ -0,0 +1,43 @@
+package domutils
+
+import (
+	"github.com/JohannesKaufmann/dom"
+	"golang.org/x/net/html"
+)
+
+func getNextTextNode(startNode *html.Node) *html.Node {
+	node := dom.GetNextNeighborNodeExcludingOwnChild(startNode)
+
+	for node != nil {
+		if node.Type == html.TextNode {
+			return node
+		}
+
+		if dom.NodeName(node) == "span" {
+			// A span has no special meaning. So we just skip it...
+			node = dom.GetNextNeighborNode(node)
+			continue
+		}
+
+		return nil
+	}
+	return nil
+}
+func getPrevTextNode(startNode *html.Node) *html.Node {
+	node := dom.GetPrevNeighborNodeExcludingOwnChild(startNode)
+
+	for node != nil {
+		if node.Type == html.TextNode {
+			return node
+		}
+
+		if dom.NodeName(node) == "span" {
+			// A span has no special meaning. So we just skip it...
+			node = dom.GetPrevNeighborNode(node)
+			continue
+		}
+
+		return nil
+	}
+	return nil
+}