Method add_header

libi2pd/HTTP.cpp:271–273

	}

	void HTTPMsg::add_header(const char *name, const std::string & value, bool replace) {
		add_header(name, value.c_str(), replace);
	}

	void HTTPMsg::add_header(const char *name, const char *value, bool replace) {
		std::size_t count = headers.count(name);