As I can found in git history, enable_x11 was used to track have_x11, and it's useless now.
Created attachment 80386 [details] [review] [PATCH] Fix a typo: enable_x11 -> have_x11
Fair enough. Applied for 1.7.4, thanks.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.