MINOR: cli: make it possible to enter multiple values at once with "set table"

The "set table" statement allows to create new entries with their respective
values. Till now it was limited to a single data type per line, requiring as
many "set table" statements as the desired data types to be set. Since this
is only a parser limitation, this patch gets rid of it. It also allows the
creation of a key with no data types (all reset to their default values).
diff --git a/include/common/defaults.h b/include/common/defaults.h
index 874d2e2..30ab148 100644
--- a/include/common/defaults.h
+++ b/include/common/defaults.h
@@ -57,7 +57,8 @@
 #define MAX_LINE_ARGS   64
 
 // max # args on a stats socket
-#define MAX_STATS_ARGS  16
+// This should cover at least 5 + twice the # of data_types
+#define MAX_STATS_ARGS  64
 
 // max # of matches per regexp
 #define	MAX_MATCH       10