[Documentation] Add about 'userTimingBlockList'

docs/documentation/sitespeed.io/configuration/config.md

@@ -44,6 +44,7 @@ Browser
       --browsertime.videoParams.convert, --videoParams.convert                                      Convert the original video to a viewable format (for most video players). Turn that off to make a faster run.  [boolean] [default: true]
       --browsertime.cpu, --cpu                                                                      Easy way to enable both chrome.timeline and CPU long tasks for Chrome and geckoProfile for Firefox  [boolean]
       --browsertime.userTimingAllowList, --userTimingAllowList                                      This option takes a regex that will whitelist which userTimings to capture in the results. All userTimings are captured by default.
+      --browsertime.userTimingBlockList, --userTimingBlockList                                      This option takes a regex that works like `userTimingAllowList`, but instead of allowing, it blocks specific userTimings from being captured.
       --axe.enable                                                                                  Run axe tests. Axe will run after all other metrics is collected and will add some extra time to each test.  [boolean]
   -r, --browsertime.requestheader, --requestheader                                                  Request header that will be added to the request. Add multiple instances to add multiple request headers. Use the following format key:value. Only works in Chrome, Firefox and Edge.
       --browsertime.cookie, --cookie                                                                Cookie that will be added to the request. Add multiple instances to add multiple cookies. Use the following format cookieName=cookieValue. Only works in Chrome and Firefox.

lib/cli/cli.js

@@ -635,6 +635,12 @@ export async function parseCommandLine() {
         'This option takes a regex that will whitelist which userTimings to capture in the results. All userTimings are captured by default.',
       group: 'Browser'
     })
+    .option('browsertime.userTimingBlockList', {
+      alias: 'userTimingBlockList',
+      describe:
+        'This option takes a regex that works like `userTimingAllowList`, but instead of allowing, it blocks specific userTimings from being captured.',
+      group: 'Browser'
+      })
     .option('axe.enable', {
       type: 'boolean',
       describe: