From `src/or/router.c`: ``` /** Return true iff <b>s</b> is a legally valid server nickname. */ int is_legal_nickname(const char *s) ``` ``` /** Return true iff <b>s</b> is a legally valid server nickname or * hex-encoded identity-key digest. */ int is_legal_nickname_or_hexdigest(const char *s) ``` ``` /** Return true iff <b>s</b> is a legally valid hex-encoded identity-key * digest. */ int is_legal_hexdigest(const char *s) ``` Will users who attempt to identify servers in ways which are not ‘legally valid’ be jailed, or merely fined?