### Please describe the problem.
$ WEBDAV_USERNAME=xxx@gmail.com WEBDAV_PASSWORD=xxx git annex initremote box.com type=webdav url=https://dav.box.com/dav/git-annex-Pictures chunksize=75mb encryption=shared
initremote box.com (encryption setup) (shared cipher) (testing WebDAV server...)

git-annex: WebDAV failed to write file: TlsNotSupported: user error
failed
git-annex: initremote: 1 failed


### What steps will reproduce the problem?
Compiled with cabal.

### What version of git-annex are you using? On what operating system?
git-annex version: 5.20131213
build flags: Assistant Webapp Pairing Testsuite S3 WebDAV Inotify DBus XMPP DNS Feeds Quvi TDFA CryptoHash
key/value backends: SHA256E SHA1E SHA512E SHA224E SHA384E SKEIN256E SKEIN512E SHA256 SHA1 SHA512 SHA224 SHA384 SKEIN256 SKEIN512 WORM URL
remote types: git gcrypt S3 bup directory rsync web webdav glacier hook
local repository version: 3
default repository version: 3
supported repository versions: 3 5
upgrade supported from repository versions: 0 1 2 4

ArchLinux

### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log


# End of transcript or log.
"""]]

> [[done]] --[[Joey]]
