xend: insufficient quoting in tapdisk

xend: insufficient quoting in tapdisk

insufficient quoting between "tap-ctl list" and xend/server/BlktapController.py

BlktapController splits the output into lines using \n, then each line
at each space, and finally each of these 'words' at the '=', which
fails if the filename contains spaces.

As a quick work-around, the attached patch fixes the problem for me. That is,
until tap-ctl changes it's output format.

A more permanent solution would be to add proper quoting / escaping to tap-ctl
and un-quoting / de-escaping  to BlktapController.py

Signed-off-by: Philipp Hahn <hahn@univention.de>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>