Function is_http_method

libi2pd/HTTP.cpp:51–54

	}

	static inline bool is_http_method(std::string_view str)
	{
		return std::find(HTTP_METHODS.begin(), HTTP_METHODS.end(), str) != std::end(HTTP_METHODS);
	}

	static void strsplit(std::string_view line, std::vector<std::string_view> &tokens, char delim, std::size_t limit = 0)
	{