Document new --quiet option.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@891 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/rdiff-backup-statistics.1

@@ -7,6 +7,7 @@ rdiff-backup-statistics \- summarize rdiff-backup statistics files
 .BI [\-\-end-time " time" ]
 .BI [\-\-minimum-ratio " ratio" ]
 .B [\-\-null-separator]
+.B [\-\-quiet]
 .I repository
 
 .SH DESCRIPTION
@@ -63,6 +64,10 @@ Specify that the lines of the file_statistics file are separated by
 nulls (\\0).  The default is to assume that newlines separate.  Use
 this switch if rdiff-backup was run with the \-\-null-separator when
 making the given repository.
+.TP
+.B \-\-quiet
+Suppress printing of the "Processing statistics from session..."
+output lines.
 
 .SH BUGS
 When aggregating multiple statistics files, some directories above