Someone using COMPAT_SVR4(_32) ?

Hi,
Recently, a number of security issues were found in COMPAT_SVR4 and
COMPAT_SVR4_32. Due to lack of maintenance and interest from developers, these
options are not reliable, and undermine the overall code quality of the system.

I would like to know whether someone here actively uses COMPAT_SVR4 and/or
COMPAT_SVR4_32, and if this use case justifies keeping these options in the
system. I plan to remove both of them, but I'd like some feedback.

Note that these options are now disabled by default.

Thanks,
Maxime