Make stack trace show up in log file with default settings

contrib/epee/src/mlog.cpp

@@ -119,10 +119,10 @@ void mlog_set_log_level(int level)
     switch (level)
     {
       case 0:
-        settings = "*:FATAL,net*:FATAL,global:INFO,verify:FATAL";
+        settings = "*:FATAL,net*:FATAL,global:INFO,verify:FATAL,stacktrace:INFO";
         break;
       case 1:
-        settings = "*:WARNING,global:INFO";
+        settings = "*:WARNING,global:INFO,stacktrace:INFO";
         break;
       case 2:
         settings = "*:INFO";

src/common/stack_trace.cpp

@@ -38,7 +38,7 @@
 #undef MONERO_DEFAULT_LOG_CATEGORY
 #define MONERO_DEFAULT_LOG_CATEGORY "stacktrace"
 
-#define ST_LOG(x) CERROR(el::base::Writer,el::base::DispatchAction::FileOnlyLog,MONERO_DEFAULT_LOG_CATEGORY) << x
+#define ST_LOG(x) CINFO(el::base::Writer,el::base::DispatchAction::FileOnlyLog,MONERO_DEFAULT_LOG_CATEGORY) << x
 
 // from http://stackoverflow.com/questions/11665829/how-can-i-print-stack-trace-for-caught-exceptions-in-c-code-injection-in-c