Update adblock.sh

.github/diy/packages/luci-app-passwall/root/usr/share/passwall/adblock.sh

@@ -50,7 +50,7 @@ process_url() {
         # 去除首尾空格
         gsub(/^[[:space:]]+|[[:space:]]+$/, "")
         # 跳过注释和空行
-        if ($0 ~ /^#/ || $0 == "") next
+        if ($0 ~ /^#/ || $0 ~ /^!/ || $0 == "") next
 
         # 前20行探测格式
         if (sample_count < 20) {