Fix --clipboard not working on wayland

[bbb651]

See 1Password/arboard#184

[robertknight]

The arboard README says:

Wayland support is not enabled by default because it may be counterintuitive to some users: it relies on the data-control protocol extension(s), which are not supported by all Wayland compositors. You can check compositor support on wayland.app

Looking at support for ext-data-control-v1 and wlr-data-control-unstable-v1 it seems that there is support under KDE (KWin) but not GNOME (Mutter). So, what will happen on a default install of Ubuntu or Fedora?

I suppose the main question I have is: Will enabling Wayland support break clipboard functionality in any environment where it works today, or will it keep those environments working and enable it for additional environments?

[bbb651]

It fallbacks to the x11 clipboard (I haven't tested it though):
https://github.com/1Password/arboard/blob/fd7db42ae6bdb6bb482e2c671192ab45ceb79dd2/src/platform/linux/mod.rs#L142-L145

[robertknight]

OK, that seems reasonable to me. Thanks for the contribution!