s6-applyuidgid mode 0700

[Earl Chew via skaware]

AFAIU s6-applyuidgid calls setuid(2), setgid(2), and setgroups(2).
Since each of these functions already enforces guardrails required to 
keep the OS safe, what is the motivation to have the mode set to 0700 
instead of the more permissive 0755 ?

Earl