httping: add page (#2768)

pages/common/httping.md

@@ -0,0 +1,19 @@
+# httping
+
+> Measure the latency and throughput of a web server.
+
+- Ping the web server on `host`:
+
+`httping -g {{host}}`
+
+- Ping the web server on `host` and `port`:
+
+`httping -h {{host}} -p {{port}}`
+
+- Ping the web server on `host` using a TLS connection:
+
+`httping -l -g https://{{host}}`
+
+- Ping the web server on `host` using HTTP basic authentication:
+
+`httping -g http://{{host}} -U {{username}} -P {{password}}`