set_no_new_privs should not take an argument

[rusty-snake]

trafficstars

NNP can not be unset, hence set_no_new_privs(false) does semantically makes no sense.

Also manpages says:

int prctl(PR_SET_NO_NEW_PRIVS, 1L, 0L, 0L, 0L); … EINVAL The second argument is not equal to 1L.

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@sunfishcode can you add semver bump label