hping: add new page (#3305)

pages/common/hping.md

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+# hping
+
+> Command-line oriented TCP/IP packet assembler and analyzer.
+> Inspired by the `ping` command.
+> More information: <http://www.hping.org>.
+
+- Ping localhost over TCP:
+
+`hping3 {{localhost}}`
+
+- Ping an IP address over TCP on a specific port:
+
+`hping3 -p {{80}} -S {{192.168.1.1}}`
+
+- Ping an IP address over UDP on port 80:
+
+`hping3 --udp -p {{80}} -S {{192.168.1.1}}`
+
+- Scan a set of TCP ports on a specific IP address:
+
+`hping3 --scan {{80,3000,9000}} -S {{192.168.1.1}}`
+
+- Perform a charge test on port 80:
+
+`hping3 --flood -p {{80}} -S {{192.168.1.1}}`