webdav: allow empty host in move
webdav: allow empty host in move

interpret empty host as current

Change-Id: I70be8aa33c0e501df22a8ad17b7b430620d45da6
GitHub-Last-Rev: 28224d33dfbf265d7cb22b890107e40a28818a45
GitHub-Pull-Request: golang/net#44
Reviewed-on: https://go-review.googlesource.com/c/net/+/181698
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/net