Allow dumping all options in a configuration

include/cppkafka/configuration_base.h

@@ -31,6 +31,7 @@
 #define CPPKAFKA_CONFIGURATION_BASE_H
 
 #include <string>
+#include <map>
 
 namespace cppkafka {
 
@@ -59,6 +60,14 @@ public:
     void set(const std::string& name, const char* value) {
         proxy_set(name, value);
     }
+protected:
+    static std::map<std::string, std::string> parse_dump(const char** values, size_t count) {
+        std::map<std::string, std::string> output;
+        for (size_t i = 0; i < count; i += 2) {
+            output[values[i]] = values[i + 1];
+        }
+        return output;
+    }
 private:
     void proxy_set(const std::string& name, const std::string& value) {
         static_cast<Concrete&>(*this).set(name, value);