New journal event command

Redundant information, but makes the journal easier to read.  The
redundancy might help making a journal replay tool robust.

Put it in Hvy Metal II now to gather some real data.

include/journal.h

@@ -41,6 +41,7 @@ void journal_login(void);
 void journal_logout(void);
 void journal_prng(unsigned);
 void journal_input(char *);
+void journal_command(char *);
 void journal_update(int);
 
 #endif