ab: add CSV example and update pt_BR translation (#11931)

* ab: add CSV example

* ab: update pt_BR translation

* ab: leave values as part of the commands

pages/common/ab.md

@@ -5,15 +5,15 @@
 
 - Execute 100 HTTP GET requests to a given URL:
 
-`ab -n {{100}} {{url}}`
+`ab -n 100 {{url}}`
 
 - Execute 100 HTTP GET requests, in concurrent batches of 10, to a URL:
 
-`ab -n {{100}} -c {{10}} {{url}}`
+`ab -n 100 -c 10 {{url}}`
 
 - Execute 100 HTTP POST requests to a URL, using a JSON payload from a file:
 
-`ab -n {{100}} -T {{application/json}} -p {{path/to/file.json}} {{url}}`
+`ab -n 100 -T {{application/json}} -p {{path/to/file.json}} {{url}}`
 
 - Use HTTP [k]eep-Alive, i.e. perform multiple requests within one HTTP session:
 
@@ -22,3 +22,7 @@
 - Set the maximum number of seconds ([t]imeout) to spend for benchmarking:
 
 `ab -t {{60}} {{url}}`
+
+- Write the results to a CSV file:
+
+`ab -e {{path/to/file.csv}}`