[#923] Look for ldconfig in /sbin if not found elsewhere
Since ldconfig is in /sbin on Debian GNU/Linux, and /sbin is not in $PATH for non-root users, ydbinstall and %YDBENV use the shell built-in command
to locate ldconfig.
Since ldconfig is in /sbin on Debian GNU/Linux, and /sbin is not in $PATH for non-root users, ydbinstall and %YDBENV use the shell built-in command
to locate ldconfig.