ADD RPL_AWAY to list of WHOIS replies

Author: emersion

_includes/messages/user_queries.md

@@ -76,6 +76,7 @@ The following numerics MAY be returned as part of the whois reply:
 * {% numeric RPL_WHOISHOST %}
 * {% numeric RPL_WHOISMODES %}
 * {% numeric RPL_WHOISSECURE %}
+* {% numeric RPL_AWAY %}
 
 Servers typically send some of these numerics only to the client itself and to servers operators, as they contain privacy-sensitive information that should not be revealed to other users.