Add db-connect, a SQL over HTTPS server

vendor/github.com/kshvakov/clickhouse/lib/leakypool/leaky_pool.go

@@ -0,0 +1,23 @@
+package leakypool
+
+var pool chan []byte
+
+func InitBytePool(size int) {
+	pool = make(chan []byte, size)
+}
+
+func GetBytes(size, capacity int) (b []byte) {
+	select {
+	case b = <-pool:
+	default:
+		b = make([]byte, size, capacity)
+	}
+	return
+}
+
+func PutBytes(b []byte) {
+	select {
+	case pool <- b:
+	default:
+	}
+}