Non-switchable transparency with vte-2.91

[czchen]

Forward from https://bugs.debian.org/820158

From original reporter Charles Malaheenee:

Since update to vte-2.91 the window opacity became non-switchable – even if
it set ‘transparent_background = 0’ or ‘transparent_window = 0’, the
opacity is always active (at least with openbox & compton) or give black
background.
Also, icons in the right-click menu had vanished.

[pepa65]

I cannot make lilyterm be non-transparent on startup, and always have to go into the menu to change the background color. Can you perhaps implement a commandline switch to completely turn of transparency?? I don't ever need it.