add critical log level

contrib/i2pd.conf

@@ -33,7 +33,7 @@
 # log = file
 ## Path to logfile (default - autodetect)
 # logfile = /var/log/i2pd/i2pd.log
-## Log messages above this level (debug, info, *warn, error, none)
+## Log messages above this level (debug, info, *warn, error, critical, none)
 ## If you set it to none, logging will be disabled
 # loglevel = warn
 ## Write full CLF-formatted date and time to log (default: write only time)

libi2pd/Log.cpp

@@ -21,6 +21,7 @@ namespace log {
 	static const char *g_LogLevelStr[eNumLogLevels] =
 	{
 		"none",     // eLogNone
+		"critical", // eLogCritical
 		"error",    // eLogError
 		"warn",     // eLogWarning
 		"info",     // eLogInfo
@@ -32,10 +33,11 @@ namespace log {
 	 * @note Using ISO 6429 (ANSI) color sequences
 	 */
 #ifdef _WIN32
-	static const char *LogMsgColors[] = { "", "", "", "", "", "" };
+	static const char *LogMsgColors[] = { "", "", "", "", "", "", "" };
 #else /* UNIX */
 	static const char *LogMsgColors[] = {
 		"\033[1;32m", /* none:    green */
+		"\033[1;41m", /* critical: red background */
 		"\033[1;31m", /* error:   red */
 		"\033[1;33m", /* warning: yellow */
 		"\033[1;36m", /* info:    cyan */
@@ -53,6 +55,7 @@ namespace log {
 		int priority = LOG_DEBUG;
 		switch (l) {
 			case eLogNone    : priority = LOG_CRIT;    break;
+			case eLogCritical: priority = LOG_CRIT;    break;
 			case eLogError   : priority = LOG_ERR;     break;
 			case eLogWarning : priority = LOG_WARNING; break;
 			case eLogInfo    : priority = LOG_INFO;    break;
@@ -124,6 +127,7 @@ namespace log {
 	void Log::SetLogLevel (const std::string& level_) {
 		std::string level=str_tolower(level_);
 		if      (level == "none")     { m_MinLevel = eLogNone; }
+		else if (level == "critical") { m_MinLevel = eLogCritical}
 		else if (level == "error")    { m_MinLevel = eLogError; }
 		else if (level == "warn")     { m_MinLevel = eLogWarning; }
 		else if (level == "info")     { m_MinLevel = eLogInfo; }

libi2pd/Log.h

@@ -27,6 +27,7 @@
 enum LogLevel
 {
 	eLogNone = 0,
+	eLogCritical,
 	eLogError,
 	eLogWarning,
 	eLogInfo,