Limit the default soft limit of opened file descriptors to 1024.
A lot of software developed for systems without closefrom(2) loops
trying to close all file descriptors from N to the rlimit, all
58977 of them, one syscall per nonexistent fd.
Note that this does not affect the hard rlimit - the process can still
raise the soft limit using setrlimit(2). They do use it, since they are
usually being developed under distributions which set the limit the
exact same way.