Rename "open a database" algorithm to "open a database connection"

It's more correct, and symmetric with "close a database connection".

Resolves #410.

index.bs

@@ -1172,7 +1172,7 @@ handler.
   deletion of [=/object stores=] and [=/indexes=] in a [=/database=].
 
   An [=/upgrade transaction=] is exclusive. The steps to [=open a
-  database=] ensure that only one [=/connection=] to the database is
+  database connection=] ensure that only one [=/connection=] to the database is
   open when an [=/upgrade transaction=] is [=transaction/live=].
   The {{IDBOpenDBRequest/upgradeneeded!!event}} event isn't fired, and thus the
   [=/upgrade transaction=] isn't started, until all other
@@ -2212,7 +2212,7 @@ The <dfn method for=IDBFactory>open(|name|, |version|)</dfn> method steps are:
 1. Run these steps [=in parallel=]:
 
     1. Let |result| be the result of
-        [=/opening a database=], with |storageKey|,
+        [=/opening a database connection=], with |storageKey|,
         |name|, |version| if given and undefined
         otherwise, and |request|.
 
@@ -4939,12 +4939,12 @@ The <dfn attribute for=IDBTransaction>onerror</dfn> attribute is an [=/event han
 <!-- ============================================================ -->
 
 <!-- ============================================================ -->
-## Opening a database ## {#opening}
+## Opening a database connection ## {#opening}
 <!-- ============================================================ -->
 
 <div algorithm>
 
-To <dfn>open a database</dfn> with |storageKey| which requested the [=/database=] to be opened, a database |name|, a database |version|, and a |request|, run these steps:
+To <dfn>open a database connection</dfn> with |storageKey| which requested the [=/database=] to be opened, a database |name|, a database |version|, and a |request|, run these steps:
 
 1. Let |queue| be the [=/connection queue=] for |storageKey| and |name|.
 
@@ -5017,7 +5017,7 @@ To <dfn>open a database</dfn> with |storageKey| which requested the [=/database=
 </div>
 
 <!-- ============================================================ -->
-## Closing a database ## {#closing-connection}
+## Closing a database connection ## {#closing-connection}
 <!-- ============================================================ -->
 
 <div algorithm>