Added test case 546 to check that subsequent FTP transfers work after a

failed one using the multi interface

tests/data/test546

@@ -0,0 +1,70 @@
+<testcase>
+<info>
+<keywords>
+FTP
+PASV
+RETR
+multi
+</keywords>
+</info>
+# Server-side
+<reply>
+<data nocheck="1">
+data
+    to
+      see
+that FTP
+works
+  so does it?
+</data>
+
+<servercmd>
+REPLY RETR 550 the file doesn't exist
+COUNT RETR 1
+REPLY SIZE 550 Can't check for file existence
+COUNT SIZE 1
+</servercmd>
+</reply>
+
+# Client-side
+<client>
+<server>
+ftp
+</server>
+<tool>
+lib533
+</tool>
+ <name>
+FTP RETR a non-existing file then a found one using the multi interface
+ </name>
+ <command>
+ftp://%HOSTIP:%FTPPORT/path/546 ftp://%HOSTIP:%FTPPORT/path/546
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+USER anonymous
+PASS ftp@example.com
+PWD
+CWD path
+EPSV
+TYPE I
+SIZE 546
+RETR 546
+EPSV
+SIZE 546
+RETR 546
+QUIT
+</protocol>
+<stdout>
+data
+    to
+      see
+that FTP
+works
+  so does it?
+</stdout>
+</verify>
+</testcase>