trawl: add page (#2893)

pages/common/trawl.md

@@ -0,0 +1,20 @@
+# trawl
+
+> Prints out network interface information to the console, much like ifconfig/ipconfig/ip/ifdata.
+> Homepage: <https://github.com/robphoenix/trawl>.
+
+- Show column names:
+
+`trawl -n`
+
+- Filter interface names using a case insensitive regular expression:
+
+`trawl -f wi`
+
+- Get a list of available interfaces:
+
+`trawl -i`
+
+- Include the loopback interface:
+
+`trawl -l`