Configure log level

[vncoelho]

Maybe it would be good to have a easily configurable parameter for Utility.cs Logger() function.

Changing:

-                Receive<LogEvent>(e => Log(e.LogSource, (LogLevel)e.LogLevel(), e.Message));
+                Receive<LogEvent>(e => Log(e.LogSource, (LogLevel)e.LogLevel(), e.Cause));

Discussing about debugging consensus logs, @ZhangTao1596 suggests that he uses this sometimes, as well as our team.

neo/src/Neo/Utility.cs

Line 29 in 8e68c3f

Receive<LogEvent>(e => Log(e.LogSource, (LogLevel)e.LogLevel(), e.Message));

[roman-khimov]

NeoGo always have had a -d CLI parameter to enable debugging, now it also has a configuration file option that allows to set any level desired. It may be useful for C# node as well.

[vncoelho]

@shargon @erikzhang, can you take a look? What is the best way to make this parameter configurable?

[vncoelho]

Maybe use ProtocolSettings directly? What is the best way to configure the Level of this Logger, as an integer and then we set as Message or Cause?