Better config doc

Author: Łukasz Gąsior

src/main/resources/application.conf

@@ -17,7 +17,9 @@ mantis {
   # timeout for shutting down the ActorSystem
   shutdown-timeout = "15.seconds"
 
-  # Whether to run Mantis in test mode (enables test_ RPC endpoints; similar to --test flag in cpp-ethereum)
+  # Whether to run Mantis in test mode (similar to --test flag in cpp-ethereum).
+  # When set, test validators and consensus are used by this node.
+  # It also enables test_ RPC endpoints.
   testmode = false
 
   # one of the algorithms defined here:

src/universal/conf/mantis.conf

@@ -27,5 +27,7 @@ include "consensus.conf"
 # Note that any settings in this file will override the ones defined in the files above
 # include "ropsten.conf"
 
-# Uncomment to run Mantis in test-mode (enables test_ RPC endpoints; similar to --test flag in cpp-ethereum)
+# Uncomment to run Mantis in test-mode (similar to --test flag in cpp-ethereum).
+# When set, test validators and consensus are used by this node.
+# It also enables test_ RPC endpoints.
 # include "testmode.conf"