Parser: Seperate parseDynamcis(), fix headline extraction with tags inside them

parser.h

@@ -15,6 +15,9 @@ class Parser : public IParser
 	virtual std::string parse(
 		const PageDao &pagedao, UrlProvider &provider, const std::string &content,
 		const std::function<std::string(std::string_view, std::string_view)> &callback) const override;
+	std::string parseDynamics(
+		const std::string &content,
+		const std::function<std::string(std::string_view, std::string_view)> &callback) const override;
 
 	using IParser::IParser;
 };