Merge branch 'non-posix-getwpnam-r' into 'master'

Remove support for non-POSIX getpwnam_r()

See merge request dbus/dbus!11

diff --cc cmake/ConfigureChecks.cmake
Simple merge

diff --cc cmake/config.h.cmake
Simple merge

diff --cc configure.ac
Simple merge

diff --cc dbus/dbus-sysdeps-unix.c
Simple merge

diff --cc dbus/dbus-sysdeps-util-unix.c
Simple merge