The old leader demotes lessor and all the leases' expire time will be
updated. Instead of returning incorrect remaining TTL, we should return
errors to force client retry.
Cherry-pick: d3bb6f688b4643155b4a9924cec726bdc76a1306
Signed-off-by: Wei Fu <fuweid89@gmail.com>
Disable following redirects from peer HTTP communication on the client's side.
Etcd server may run into SSRF (Server-side request forgery) when adding a new
member. If users provide a malicious peer URL, the existing etcd members may be
redirected to another unexpected internal URL when getting the new member's
version.
Signed-off-by: Ivan Valdes <ivan@vald.es>
