当max_connections 调小，对应闲置的tcp链接并没有被释放

`

CoTask ServiceGroup::checkConnectionsRegularly() {

while (true) {

XLOGF(DBG9, "server@{} check connections", fmt::ptr(this));

ioWorker().checkConnections(Address{0, 0, Address::RDMA}, config_.connection_expiration_time());

co_await folly::coro::sleep(config_.check_connections_interval().asMs());
}
}

`
代码中只针对RDMA进行了链接释放，并没有对TCP 链接进行释放。而实现上，RDMA是需要TCP来传递device信息

Start at ServiceGroup::checkConnectionsRegularly() and follow ioWorker().checkConnections(), comparing the RDMA path with the TCP connections it uses to transfer device information. Confirm how max_connections changes are handled for idle links, then verify that idle TCP connections are released after the limit is reduced.

Written by the indexing model from the issue text.