DDSSEC13 — Broken cross-references

There are a few cross-references that don't resolve, resulting in the text "see 0" or "in subclause 0" in the spec:

• Table 30 plugin_endpoint_attributes column 3 contains "found in 0"
• Table 52 get_authenticated_peer_credential_token contains "See section 0"
• 9.4.1.2.6.7 right before the bullet list
• Table 63 validate_remote_permissions
• 9.5.3.3.4.1 final paragraph has "subclause 0"