Merge recent trunk changes into the NGQP branch.

FossilOrigin-Name: aebe1f2603ee04d792af73aaf59625bda99d5cd1

src/sqliteInt.h

@@ -114,7 +114,7 @@
 ** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.
 ** 0 means mutexes are permanently disable and the library is never
 ** threadsafe.  1 means the library is serialized which is the highest
-** level of threadsafety.  2 means the libary is multithreaded - multiple
+** level of threadsafety.  2 means the library is multithreaded - multiple
 ** threads can use SQLite as long as no two threads try to use the same
 ** database connection at the same time.
 **
@@ -748,7 +748,6 @@ typedef struct WhereLevel WhereLevel;
 struct Db {
   char *zName;         /* Name of this database */
   Btree *pBt;          /* The B*Tree structure for this database file */
-  u8 inTrans;          /* 0: not writable.  1: Transaction.  2: Checkpoint */
   u8 safety_level;     /* How aggressive at syncing data to disk */
   Schema *pSchema;     /* Pointer to database schema (possibly shared) */
 };