bootstrap ignores config file

[unsystemizer]

Ideally the bootstrap command should behave consistently as all the others (read the config file):

$ counterparty-server --config-file /home/xcp/.config/counterparty-server/server.conf --testnet bootstrap
[INFO] Running v1.1.1 of counterparty-server.
Downloading database from https://s3.amazonaws.com/counterparty-bootstrap/counterparty-db-testnet.latest.tar.gz...
100.0% 52158464 / 52151822
Extracting to "/home/xcp/.local/share/counterparty"...
Cleaning up...

$ cat /home/xcp/.config/counterparty-server/server.conf | grep data
data-dir=/blockchain/bitcoin/data/counterparty/
database-file=/blockchain/bitcoin/data/counterparty/counterparty.9.testnet.db

In this particular case it would be nice if at least data-dir was recognized.