Update README.md

Document that allowManagementFrom is an array

service/README.md

@@ -31,7 +31,7 @@ Settings available in `local.conf` (this is not valid JSON, and JSON does not al
 		"softwareUpdateChannel": "release"|"beta", /* Software update channel */
 		"softwareUpdateDist": true|false, /* If true, distribute software updates (only really useful to ZeroTier, Inc. itself, default is false) */
 		"interfacePrefixBlacklist": [ "XXX",... ], /* Array of interface name prefixes (e.g. eth for eth#) to blacklist for ZT traffic */
-		"allowManagementFrom": "NETWORK/bits"|null, /* If non-NULL, allow JSON/HTTP management from this IP network. Default is 127.0.0.1 only. */
+		"allowManagementFrom": [ "NETWORK/bits"|null ], /* If non-NULL, allow JSON/HTTP management from this IP network. Default is 127.0.0.1 only. */
 		"bind": [ "ip",... ], /* If present and non-null, bind to these IPs instead of to each interface (wildcard IP allowed) */
 		"allowTcpFallbackRelay": true|false /* Allow or disallow establishment of TCP relay connections (true by default) */
 	}