Wt 4: Cannot build Dbo separately
If we extract Wt/Dbo files outside of source tree (in case of separate lib compilation), build fails.
Such setup is useful for pkg managers. E.g. in such subproject structure https://cppan.org/projects/pvt.cppan.demo.emweb.wt
The error is because of relative includes in dbo files like:
You can grep for '../' in dbo dir to see affected files (EscapeOStream.[hC], StringStream.[hC]).