Finish moving from http-conduit to http-client API, restore TLS support.
http-conduit 2.0 API, also pulls in http-client
0.4 broke users with Paths_DAV import; undo for now.
Switch from cmdargs to optparse-applicative, add --depth option for getprops, hdav put, CalDAV REPORT method.
Update for http-conduit 1.9.0 API
Joey's putContent
getProps, makeCollection, and moveContent from Joey Hess
file deletion, by Joey Hess
Update for newer build dependencies.
Preliminary release.