Update documentation

docs/source/troubleshooting/general.rst

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+:github_url: https://github.com/SunshineStream/Sunshine/tree/nightly/docs/source/troubleshooting/general.rst
+
+General
+=======
+If you forgot your credentials to the web UI, try this.
+
+   .. code-block:: bash
+
+      sunshine -creds <new username> <new password>
+
+Can't access the web UI?
+
+   #. Check firefall rules.

docs/source/troubleshooting/linux.rst

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+:github_url: https://github.com/SunshineStream/Sunshine/tree/nightly/docs/source/troubleshooting/linux.rst
+
+Linux
+=====
+If screencasting fails with Wayland, you may need to run the following to force screencasting with X11.
+
+   .. code-block:: bash
+
+      sudo setcap -r $(readlink -f $(which sunshine))

docs/source/troubleshooting/macos.rst

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+:github_url: https://github.com/SunshineStream/Sunshine/tree/nightly/docs/source/troubleshooting/macos.rst
+
+MacOS
+=====
+If you get this error:
+
+   ``Dynamic session lookup supported but failed: launchd did not provide a socket path, verify that
+   org.freedesktop.dbus-session.plist is loaded!``
+
+   Try this.
+
+      .. code-block:: bash
+
+         launchctl load -w /Library/LaunchAgents/org.freedesktop.dbus-session.plist

docs/source/troubleshooting/windows.rst

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+:github_url: https://github.com/SunshineStream/Sunshine/tree/nightly/docs/source/troubleshooting/windows.rst
+
+Windows
+=======
+No gamepad is detected.
+
+   #. Verify that you've installed `ViGEmBus <https://github.com/ViGEm/ViGEmBus/releases/latest>`_.