block: protect path_has_protocol from filenames with colons
path_has_protocol will erroneously return "true" if the colon is part of a filename. These names are common with stable device names produced by udev. We cannot fully protect against this in case the filename does not have a path component (e.g. if the current directory is /dev/disk/by-path), but in the common case there will be a slash before and path_has_protocol can easily detect that and return false. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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