This patch fixes typo in parameter usage when help printed

diff --git a/qmHandle b/qmHandle
index af083f4..a1f3eee 100755
--- a/qmHandle
+++ b/qmHandle
@@ -828,7 +828,7 @@ sub Usage {
     print "  -mN      : display message number N\n";
     print "  -dN      : delete message number N\n";
     print "  -fsender : delete message from sender\n";
-    print "  -f're'   : delete message from senders matching regular expression re\n";
+    print "  -F're'   : delete message from senders matching regular expression re\n";
     print "  -Stext   : delete all messages that have/contain text as Subject\n";
     print "  -h're'   : delete all messages with headers matching regular expression re (case insensitive)\n";
     print "  -b're'   : delete all messages with body matching regular expression re (case insensitive)\n";