Fix for #10470 as suggested by arma
--- /dev/null
+ o Documentation fixes:
+ - Note that all but one DirPort entry must have the NoAdvertise flag
+ set. Fix for #10470.
+
[[DirPort]] **DirPort** \['address':]__PORT__|**auto** [_flags_]::
If this option is nonzero, advertise the directory service on this port.
Set it to "auto" to have Tor pick a port for you. This option can occur
- more than once. (Default: 0)
+ more than once, but only one advertised DirPort is supported: all
+ but one DirPort must have the **NoAdvertise** flag set. (Default: 0)
+
The same flags are supported here as are supported by ORPort.