FTBFS on FreeBSD because of socket credentials
I cannot compile dbus 1.12.20 on FreeBSD, because of this error in dbus-sysdeps-unix.c
/root/.conan/data/dbus/1.12.20/_/_/build/531b5f859e5602ea7d544f5adc72ae1c68a7b11d/source_subfolder/dbus/dbus-sysdeps-unix.c:2219:2: warning: Socket credentials not supported on this Unix OS [-W#warnings]
#warning Socket credentials not supported on this Unix OS
^
/root/.conan/data/dbus/1.12.20/_/_/build/531b5f859e5602ea7d544f5adc72ae1c68a7b11d/source_subfolder/dbus/dbus-sysdeps-unix.c:2220:2: warning: Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus [-W#warnings]
#warning Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus
^
/root/.conan/data/dbus/1.12.20/_/_/build/531b5f859e5602ea7d544f5adc72ae1c68a7b11d/source_subfolder/dbus/dbus-sysdeps-unix.c:2230:3: error: Credentials passing not working on this OS is a regression!
# error Credentials passing not working on this OS is a regression!
^
more details on https://github.com/ericLemanissier/conan-center-index/runs/1655737093?check_suite_focus=true#step:3:5419