From: Marek Behún <[email-masked]>

Make usage text in wpr.go does reflect usage information from README.md.

diff --git a/wpr.go b/wpr.go
--- a/wpr.go
+++ b/wpr.go
@@ -28,25 +28,27 @@ const longUsage = `
    %s [installroot|removeroot] [options]
    %s [record|replay] [options] archive_file
 
-   Before: Install a test root CA.
-     $ GOPATH=$PWD go run src/wpr.go installroot
-
    To record web pages:
-     1. Start this program in record mode.
-        $ GOPATH=$PWD go run src/wpr.go record archive.json
+     1. Start wpr in record mode.
+        $ wpr record --http_port=8080 --https_port=8081 /tmp/archive.wprgo
      2. Load the web pages you want to record in a web browser. It is important to
         clear browser caches before this so that all subresources are requested
-        from the network.
+        from the network. This can be done by specifying a new user-data-dir.
+        Example:
+        $ google-chrome-beta --user-data-dir=$foo \
+           --host-resolver-rules="MAP *:80 127.0.0.1:8080,MAP *:443 127.0.0.1:8081,EXCLUDE localhost"
+           --ignore-certificate-errors-spki-list=PhrPvGIaAMmd29hj8BCZOq096yj7uMpRNHpn5PDxI6I=
      3. Kill the process to stop recording.
 
    To replay web pages:
-     1. Start this program in replay mode with a previously recorded archive.
-        $ GOPATH=$PWD go run src/wpr.go replay archive.json
+     1. Start wpr in replay mode.
+        $ wpr replay --http_port=8080 --https_port=8081 /tmp/archive.wprgo
      2. Load recorded pages in a web browser. A 404 will be served for any pages or
         resources not in the recorded archive.
-
-   After: Remove the test root CA.
-     $ GOPATH=$PWD go run src/wpr.go removeroot`
+        Example:
+        $ google-chrome-beta --user-data-dir=$foo \
+           --host-resolver-rules="MAP *:80 127.0.0.1:8080,MAP *:443 127.0.0.1:8081,EXCLUDE localhost"
+           --ignore-certificate-errors-spki-list=PhrPvGIaAMmd29hj8BCZOq096yj7uMpRNHpn5PDxI6I=`
 
 type CertConfig struct {
 	// Flags common to all commands.