Function egress_pattern_contains 

pub fn egress_pattern_contains(grant: &str, carveout: &str) -> bool

Return whether an egress grant contains every destination matched by a carveout pattern.

Both arguments must already be canonicalized by normalize_egress_pattern. Exact grants contain only the same exact host. A suffix grant contains exact subdomains and narrower suffix grants, but never its apex. An exact grant can never contain a suffix grant.