pgxpool pools always connect lazily

Rename constructor functions now that they don't actually connect.

pgxpool/doc.go

@@ -2,11 +2,11 @@
 /*
 pgxpool implements a nearly identical interface to pgx connections.
 
-Establishing a Connection
+Creating a Pool
 
-The primary way of establishing a connection is with `pgxpool.Connect`.
+The primary way of creating a pool is with `pgxpool.New`.
 
-    pool, err := pgxpool.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+    pool, err := pgxpool.New(context.Background(), os.Getenv("DATABASE_URL"))
 
 The database connection string can be in URL or DSN format. PostgreSQL settings, pgx settings, and pool settings can be
 specified here. In addition, a config struct can be created by `ParseConfig` and modified before establishing the
@@ -20,6 +20,9 @@ connection with `ConnectConfig`.
         // do something with every new connection
     }
 
-    pool, err := pgxpool.ConnectConfig(context.Background(), config)
+    pool, err := pgxpool.NewConfig(context.Background(), config)
+
+A pool returns without waiting for any connections to be established. Acquire a connection immediately after creating
+the pool to check if a connection can successfully be established.
 */
 package pgxpool