Add forked Maatkit tools in bin/ and their tests in t/.

t/pt-table-sync/samples/issue_920.sql

@@ -0,0 +1,19 @@
+drop database if exists issue_920;
+create database issue_920;
+use issue_920;
+
+CREATE TABLE PK_UK_test (
+  id int(10),
+  id2 int(10),
+  PRIMARY KEY (id),
+  UNIQUE KEY id2 (id2)
+) ENGINE=InnoDB;
+
+CREATE TABLE PK_UK_test_2 (
+  id int(10),
+  id2 int(10),
+  PRIMARY KEY (id),
+  UNIQUE KEY id2 (id2)
+) ENGINE=InnoDB;
+
+insert into PK_UK_test(id,id2) VALUES(1,200),(2,100);