dns: Add neighbor-based hostname resolution to local server

docs/configuration/shared/neighbor.md

@@ -8,7 +8,9 @@ Match LAN devices by MAC address and hostname using
 [`source_mac_address`](/configuration/route/rule/#source_mac_address) and
 [`source_hostname`](/configuration/route/rule/#source_hostname) rule items.
 
-Neighbor resolution is automatically enabled when these rule items exist.
+Neighbor resolution is automatically enabled when these rule items exist
+or when a [local DNS server](/configuration/dns/server/local/) sets
+[neighbor_domain](/configuration/dns/server/local/#neighbor_domain).
 Use [`route.find_neighbor`](/configuration/route/#find_neighbor) to force enable it for logging without rules.
 
 ## Linux

docs/configuration/shared/neighbor.zh.md

@@ -8,7 +8,7 @@ icon: material/lan
 [`source_mac_address`](/configuration/route/rule/#source_mac_address) 和
 [`source_hostname`](/configuration/route/rule/#source_hostname) 规则项匹配局域网设备的 MAC 地址和主机名。
 
-当这些规则项存在时，邻居解析自动启用。
+当这些规则项存在，或 [local DNS 服务器](/zh/configuration/dns/server/local/) 设置了 [neighbor_domain](/zh/configuration/dns/server/local/#neighbor_domain) 时，邻居解析自动启用。
 使用 [`route.find_neighbor`](/configuration/route/#find_neighbor) 可在没有规则时强制启用以输出日志。
 
 ## Linux