Maintain a circular buffer of recent commands, add to crashlog.

Add console command to dump command log.
Increase max crashlog size.

src/crashlog.h

@@ -103,6 +103,7 @@ protected:
 	char *LogConfiguration(char *buffer, const char *last) const;
 	char *LogLibraries(char *buffer, const char *last) const;
 	char *LogGamelog(char *buffer, const char *last) const;
+	char *LogCommandLog(char *buffer, const char *last) const;
 
 public:
 	/** Stub destructor to silence some compilers. */