Add SkipAnalyzer.

This is WIP: The test case would require a new pcap or the possibility
to overwrite analyzer mappings. The CustomEncapsulationSkip method and
the corresponding options need to be removed.

src/packet_analysis/protocol/skip/Skip.h

@@ -0,0 +1,27 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+
+#pragma once
+
+#include <packet_analysis/Analyzer.h>
+#include <packet_analysis/Component.h>
+
+namespace zeek::packet_analysis::Skip {
+
+class SkipAnalyzer : public Analyzer {
+public:
+	SkipAnalyzer();
+	~SkipAnalyzer() override = default;
+
+	void Initialize() override;
+	AnalyzerResult Analyze(Packet* packet, const uint8_t*& data) override;
+
+	static zeek::packet_analysis::AnalyzerPtr Instantiate()
+		{
+		return std::make_shared<SkipAnalyzer>();
+		}
+
+private:
+	bro_uint_t skip_bytes = 0;
+};
+
+}