Implement Hosts section for each type of use-case.

t/pt-upgrade/samples/003/insert_truncate_warning_results.txt

@@ -0,0 +1,60 @@
+
+#-----------------------------------------------------------------------
+# Logs
+#-----------------------------------------------------------------------
+
+Results directory: ...
+
+#-----------------------------------------------------------------------
+# Hosts
+#-----------------------------------------------------------------------
+
+host1:
+
+  Reading results from ...
+
+host2:
+
+  DSN:       h=127.1,P=12348
+  hostname:  ...
+  MySQL:     ...
+
+########################################################################
+# Query class AAD020567F8398EE
+########################################################################
+
+Reporting class because it has diffs, but hasn't been reported yet.
+
+Total queries      1
+Unique queries     1
+Discarded queries  0
+
+insert into t (id, username) values(?+)
+
+##
+## Warning diffs: 1
+##
+
+-- 1.
+
+   Code: 1265
+  Level: Warning
+Message: Data truncated for column 'username' at row 1
+
+vs.
+
+No warning 1265
+
+INSERT INTO t (id, username) VALUES (NULL, 'long_username')
+
+########################################################################
+# Stats
+########################################################################
+
+failed_queries        0
+not_select            0
+queries_filtered      0
+queries_no_diffs      0
+queries_read          1
+queries_with_diffs    1
+queries_with_errors   0