; The address on which to accept FastCGI requests.
; Valid syntaxes are:
-; 'ip.add.re.ss:port' - to listen on a TCP socket to a specific address on
+; 'ip.add.re.ss:port' - to listen on a TCP socket to a specific IPv4 address on
; a specific port;
; '[ip:6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on
; a specific port;
-; 'port' - to listen on a TCP socket to all addresses on a
+; 'port' - to listen on a TCP socket to all IPv4 addresses on a
+; specific port;
+; '[::]:port' - to listen on a TCP socket to all addresses on a
; specific port;
; '/path/to/unix/socket' - to listen on a unix socket.
; Note: This value is mandatory.