-This specifies the debug level. It must be set to 1, 2, 3 or 4, where 1
-logs only serious errors, and 4 logs everything. The default is 3 which
-logs errors, warnings and some informational messages.
+This specifies the debug level. It must be set to 1, 2, 3, 4 or 5, where
+1 logs only serious errors, and 5 logs everything. The default is 2 which
+logs errors, warnings and a few informational messages.
+
+.TP
+.B -p
+.sp
+\fIPretend\fR
+.sp
+The proxy reads configuration files and performs initialisation as
+usual, but exits prior to creating any sockets. It will return different
+exit codes depending on whether the configuration files are okay. This
+may be used to verify configuration files, and can be done while another
+instance is running.