[PATCH v3] iptables: libxt_string.man add examples

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Add usage examples for string and hex string patterns.

Reference: http://bugs.debian.org/699904
Signed-off-by: Laurence J. Lane <ljlane@xxxxxxxxxx>
---
 extensions/libxt_string.man | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/extensions/libxt_string.man b/extensions/libxt_string.man
index b6b271d..3a2fa08 100644
--- a/extensions/libxt_string.man
+++ b/extensions/libxt_string.man
@@ -16,3 +16,13 @@ Matches the given pattern.
 .TP
 [\fB!\fP] \fB\-\-hex\-string\fP \fIpattern\fP
 Matches the given pattern in hex notation.
+.TP
+Examples:
+.IP
+# The string pattern can be used for simple text characaters.
+.br
+iptables \-A INPUT \-p tcp \-\-dport 80 \-m string \-\-algo bm \-\-string 'GET /index.html' \-j LOG
+.IP
+# The hex string pattern can be used for non-printable characaters, like |0D 0A| or |0D0A|.
+.br
+iptables \-p udp \-\-dport 53 \-m string \-\-algo bm \-\-from 40 \-\-to 57 \-\-hex\-string '|03|www|09|netfilter|03|org|00|'
-- 
1.8.4.rc3

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