Problem: Currently the only way to safely exit the DDB hangman game is to win (which is hard)
Solution: Add a way to safely exit using CTRL+C (which is expected to help exit a program anyway)

===================================================================

diff --git sys/ddb/db_hangman.c sys/ddb/db_hangman.c
index e73bd032f..5b13d1d68 100644
--- sys/ddb/db_hangman.c
+++ sys/ddb/db_hangman.c
@@ -48,6 +48,7 @@ struct _abc {
 #define	TOLOWER(c)	((c)|0x20)
 #define	ISLOWALPHA(c)	('a'<=(c) && (c)<='z')
 #define	ISALPHA(c)	ISLOWALPHA(TOLOWER(c))
+#define	CTRL(c)		((c) & 0x1f)
 
 void	 db_hang(int, char *, struct _abc *);
 
@@ -176,6 +177,10 @@ db_hangman(db_expr_t addr, int haddr, db_expr_t count, char *modif)
 		}
 		db_hang(tries, word, sabc);
 		c = cngetc();
+
+		if (c == CTRL('c'))
+			break;
+
 		c = TOLOWER(c);
 
 		if (ISLOWALPHA(c) && ABC_ISCLR(c)) {