CURL: Encode spaces

[DinosL]

curl expects a fully valid, already encoded url when executing a request, whereashttplib constructs requests from different components (e.g. host, path) and silently encodes them.

CURLU_URLENCODE is not an option here since it only encodes the host part (see manual). I think, it would only be useful if we pass individual components (or split the full url).

[carlopi]

Thanks!