Simplify BCLog::Level enum class and LogLevelToStr() function

- simplify the BCLog::Level enum class (and future changes to it) by
  only setting the value of the first enumerator

- move the BCLog::Level:None enumerator to the end of the BCLog::Level
  enum class and LogLevelToStr() member function, as the None enumerator
  is only used internally, and by being the highest BCLog::Level value it
  can be used to iterate over the enumerators

- replace the unused BCLog::Level:None string "none" with an empty string
  as the case will never be hit

- add documentation

1 files changed, 5 insertions, 5 deletions

diff --git a/src/logging.h b/src/logging.h
index 50869ad89a..f3914958cf 100644
--- a/src/logging.h
+++ b/src/logging.h
@@ -68,11 +68,11 @@ namespace BCLog {
         ALL         = ~(uint32_t)0,
     };
     enum class Level {
-        Debug = 0,
-        None = 1,
-        Info = 2,
-        Warning = 3,
-        Error = 4,
+        Debug = 0, // High-volume or detailed logging for development/debugging
+        Info,      // Default
+        Warning,
+        Error,
+        None, // Internal use only
     };
 
     class Logger