FTP improvements:

If EPSV, EPRT or LPRT is tried and doesn't work, it will not be retried on
the same server again even if a following request is made using a persistent
connection.

If a second request is made to a server, requesting a file from the same
directory as the previous request operated on, libcurl will no longer make
that long series of CWD commands just to end up on the same spot. Note that
this is only for *exactly* the same dir. There is still room for improvements
to optimize the CWD-sending when the dirs are only slightly different.

Added test 210, 211 and 212 to verify these changes. Had to improve the
test script too and added a new primitive to the test file format.

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/data/test210 b/tests/data/test210
new file mode 100644
index 000000000..723508086
--- /dev/null
+++ b/tests/data/test210
@@ -0,0 +1,43 @@
+# Server-side
+<reply>
+<data>
+data blobb
+</data>
+<datacheck>
+data blobb
+data blobb
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+ftp
+</server>
+ <name>
+Get two FTP files from the same remote dir: no second CWD
+ </name>
+ <command>
+ftp://%HOSTIP:%FTPPORT/a/path/210 ftp://%HOSTIP:%FTPPORT/a/path/210
+</command>
+</test>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+USER anonymous

+PASS curl_by_daniel@haxx.se

+PWD

+CWD a

+CWD path

+EPSV

+TYPE I

+SIZE 210

+RETR 210

+EPSV

+TYPE I

+SIZE 210

+RETR 210

+QUIT

+</protocol>
+</verify>