doc: add --user-agent to common options

diff --git a/doc/common-options.rst b/doc/common-options.rst
index 4e63b234e9d6d9b9e5fdb58d2c066a3e711cc618..f2c1d967c6ceabb0b966ef98e2e5a1be4c1bb683 100644 (file)
--- a/doc/common-options.rst
+++ b/doc/common-options.rst
@@ -21,3 +21,7 @@
 .. option:: -v, --verbose
 
    Provide more verbose output.
+
+.. option:: --user-agent <string>
+
+   Set a custom user agent string for HTTP requests.