Added new 'type' function, other mods

luprex/cpp/util.hpp

@@ -14,6 +14,10 @@ namespace util {
 using stringvec = std::vector<std::string>;
 using stringset = std::set<std::string>;
 
+// String to lowercase/uppercase
+std::string tolower(std::string input);
+std::string toupper(std::string input);
+
 // String to integer.  Returns errval if the number is not parseable.
 int64_t strtoint(const std::string &value, int64_t errval);