- /* user: the user@host allowed to connect. multiple IPv4/IPv6 user
- * lines are permitted per auth block.
+ /* user: the user@host allowed to connect. Multiple IPv4/IPv6 user
+ * lines are permitted per auth block. This is matched against the
+ * hostname and IP address (using :: shortening for IPv6 and
+ * prepending a 0 if it starts with a colon) and can also use CIDR
+ * masks.