Fix wrong command-line options in man page.
Closes issue
@@ -59,10 +59,10 @@ Print metadata associated to the rule.
.B \-D " --print-module-data"
Print module data.
.TP
-.B \-g " --print-namespace"
+.B \-e " --print-namespace"
Print namespace associated to the rule.
.TP
-.B \-D " --print-stats"
+.B \-S " --print-stats"
Print rules' statistics.
.TP
.B \-s " --print-strings"
