test1662: verify formpost, 301 redirect, no rewind possible

Reproduces #9735 and verifies the subsequent fix. The original issue
uses a pipe that cannot be rewound, but this test case instead sets a
callback without rewind ability to get roughly the same properties but
being a much more portable test.

tests/data/Makefile.inc

@@ -208,7 +208,7 @@ test1620 test1621 \
 test1630 test1631 test1632 test1633 test1634 test1635 \
 \
 test1650 test1651 test1652 test1653 test1654 test1655 \
-test1660 test1661 \
+test1660 test1661 test1662 \
 \
 test1670 test1671 \
 \

tests/data/test1662

@@ -0,0 +1,67 @@
+<testcase><testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data nocheck="yes">
+HTTP/1.1 301 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Last-Modified: Tue, 13 Jun 2000 12:10:00 GMT
+ETag: "21025-dc7-39462498"
+Accept-Ranges: bytes
+Content-Length: 6
+Location: %TESTNUMBER0002
+Content-Type: text/html
+Funny-head: yesyes
+
+-foo-
+</data>
+<data2 nocheck="yes">
+HTTP/1.1 200 OK
+Content-Length: 6
+Connection: close
+Funny-head: nono
+
+-bar-
+</data2>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+Mime
+debug
+</features>
+<server>
+http
+</server>
+<name>
+HTTP formpost from callback and a redirect and switch to GET
+</name>
+<tool>
+lib%TESTNUMBER
+</tool>
+<command>
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+
+# This does not verify the protocol because the sending of data might be
+# aborted early making it hard to check properly.
+<stdout>
+-bar-
+</stdout>
+</verify>
+</testcase>