For Unix-domain sockets (e.g. localspy sockets on *nix), use the [unix]

section of the sockopts.ini (if there is one) rather than the [tcp] or
[udp] sections. This resolves the errors:
      term xxxx !ERROR 95 setting socket option (TCP_NODELAY, 1) to 1
which started appearing after the TCP_NODELAY option was added to the
[tcp] section.

src/sbbs3/sockopts.c

 /* sockopts.c */
+// vi: tabstop=4
 
 /* Set socket options based on contents of ctrl/sockopts.ini */
 
@@ -64,8 +65,14 @@ int DLLCALL set_socket_options(scfg_t* cfg, SOCKET sock, const char* protocol, c
 
 	result=iniGetSocketOptions(list,ROOT_SECTION,sock,error,errlen);
 
-	if(result==0)
-		result=iniGetSocketOptions(list,type==SOCK_STREAM ? "tcp":"udp",sock,error,errlen);
+	if(result==0) {
+		const char* section = (type==SOCK_STREAM) ? "tcp":"udp";
+		struct sockaddr sockaddr;
+		socklen_t len = sizeof(sockaddr);
+		if(getsockname(sock, &sockaddr, &len) == 0 && sockaddr.sa_family == PF_UNIX)
+			section = "unix";
+		result=iniGetSocketOptions(list,section,sock,error,errlen);
+	}
 	if(result==0 && protocol!=NULL && *protocol!=0)
 		result=iniGetSocketOptions(list,protocol,sock,error,errlen);