Update Usage.md and What's-new.md

doc/Usage.md

@@ -1,24 +1,44 @@
-The first time, you can run `google-drive-ocamlfuse` without parameters:
+First, you must [set up OAuth
+2.0](https://support.google.com/cloud/answer/6158849?hl=en):
 
-    google-drive-ocamlfuse
+1. [Activate](https://cloud.google.com/service-usage/docs/enable-disable) the
+   `Google Drive API`.
+1. Create an OAuth client ID.
+1. Choose `Desktop` as `Application type`.
+1. Set the `Name` to anything you like.
 
-This command will create the default application directory (`~/.gdfuse/default`), containing the configuration file `config` (see the [[Configuration]] page for more details about configuration). And it will start a web browser to obtain authorization to access your Google Drive. This will let you modify default configuration before mounting the filesystem.
+This way you will get a `Client ID` and `Client secret` that you can use to
+access your Drive. To authorize `google-drive-ocamlfuse`, pass the client ID
+and the client secret on the command line, e.g.:
 
-Then you can choose a local directory to mount your Google Drive (e.g.: `~/GoogleDrive`).
+    google-drive-ocamlfuse -id xxxxxxxxxx.apps.googleusercontent.com -secret XXX-YYY-ZZZ
+
+This command will create the default application directory
+(`~/.gdfuse/default`), containing the configuration file `config` (see the
+[wiki
+page](https://github.com/astrada/google-drive-ocamlfuse/wiki/Configuration)
+for more details about configuration). And it will start a web browser to
+obtain authorization to access your Google Drive. This way, you can modify the
+default configuration before mounting the filesystem.
+
+Then, you can choose a local directory to mount your Google Drive (e.g.: `~/GoogleDrive`).
 
 Create the mount point, if it doesn't exists:
 
     mkdir ~/GoogleDrive
 
-Then you can mount the filesystem:
+Then, you can mount the filesystem:
 
     google-drive-ocamlfuse ~/GoogleDrive
 
 If you have more than one account, you can run:
 
-    google-drive-ocamlfuse -label label [mountpoint]
+    google-drive-ocamlfuse -label [label] ~/GoogleDrive
 
-Using `label` to distinguish between different accounts. The program will use the directory `~/.gdfuse/label` to host configuration, application state, and file cache. No file is shared among different accounts, so you can have a different configuration for each one.
+Using `label` to distinguish different accounts. The program will use the
+directory `~/.gdfuse/[label]` to host the configuration, the application
+state, and the file cache. No file is shared among different accounts, so you
+can have a different configuration for each one.
 
 To unmount the filesystem, issue this command:
 
@@ -68,4 +88,10 @@ Run `google-drive-ocamlfuse -help` to get all the command options available. To
 * `-redirect_uri`: Specifies a custom `redirect_uri` for the OAuth2 [flow](https://developers.google.com/identity/protocols/OAuth2InstalledApp#step-2-send-a-request-to-googles-oauth-20-server)
 
 #### Since 0.7.13
-* `-device`: Use [OAuth2 for Devices](https://github.com/astrada/google-drive-ocamlfuse/wiki/OAuth2-for-Devices) authorization flow
+* `-device`: Use [OAuth2 for Devices](https://github.com/astrada/google-drive-ocamlfuse/wiki/OAuth2-for-Devices) authorization flow
+
+#### Since 0.7.32
+* `-port`: This option can be used to specify a port for the embedded HTTP
+  server, that will receive the verification code from Google during
+  authorization. The default is 8080.
+

doc/What's-new.md

@@ -1,3 +1,7 @@
+0.7.32
+======
+This version introduces a new command line option: `-port`, to specify a port for the embedded HTTP server, that will receive the verification code from Google during authorization. The default is 8080.
+
 0.7.21
 ======
 This version introduces a new config option: `background_folder_fetching`. If set to a `true` (the default is `false`), it starts a thread to fetch folder data in background, so accessing folders should be faster.