FTP support has been deprecated since LO 7.4.
The UCP currently doesn't even support TLS connections.
Also disable FTP protocol in libcurl.
Also remove JunitTest_ucb_complex: turns out the only test in it,
checkWrongFtpConnection, fails on Linux because now GIO UCP handles
ftp:// URLs and it throws InteractiveAugmentedIOException instead of
expected ones, and on other platforms it would fail differently because
there is no GIO.
Change-Id: I4631d124371fef390f105fb16bf09aaa59e739e7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/159065
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
