With hostNum prepended to the address, the client won't even be
able to connect and will return an error message with the invalid
address.
Example:
requests.exceptions.InvalidSchema: No connection adapters were found for '6http://localhost:27701/sync/meta'
Should fix an error encountered when the user used AnkiWeb in the
past and receives a JSON decode error because an unrecognized
endpoint (/[somenumber]sync instead of /sync) doesn't return what
the client expects.
Closes#10, fixes#8.
