Rename the Db.zName field to Db.zDbSName to make it more descriptive and to
distinguish it from all of the other "zName" variables scattered throughout
the code.

FossilOrigin-Name: 92a22f01343a898455fd61c3b8e7d7c954f5b569
diff --git a/src/resolve.c b/src/resolve.c
index 8ae7f09..206015f 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -221,8 +221,8 @@
       zDb = 0;
     }else{
       for(i=0; i<db->nDb; i++){
-        assert( db->aDb[i].zName );
-        if( sqlite3StrICmp(db->aDb[i].zName,zDb)==0 ){
+        assert( db->aDb[i].zDbSName );
+        if( sqlite3StrICmp(db->aDb[i].zDbSName,zDb)==0 ){
           pSchema = db->aDb[i].pSchema;
           break;
         }