Added --prompt and ``prompt'' command, add dynamic prompt support to ``mysql''.

client/client_priv.h

@@ -31,4 +31,4 @@ enum options { OPT_CHARSETS_DIR=256, OPT_DEFAULT_CHARSET,
 	       OPT_LOW_PRIORITY, OPT_AUTO_REPAIR, OPT_COMPRESS,
 	       OPT_DROP, OPT_LOCKS, OPT_KEYWORDS, OPT_DELAYED, OPT_OPTIMIZE,
 	       OPT_FTB, OPT_LTB, OPT_ENC, OPT_O_ENC, OPT_ESC, OPT_TABLES,
-	       OPT_MASTER_DATA, OPT_AUTOCOMMIT, OPT_LOCAL_INFILE};
+	       OPT_MASTER_DATA, OPT_AUTOCOMMIT, OPT_LOCAL_INFILE, OPT_PROMPT};