add SSL switch

Signed-off-by: xiehuc <xiehuc@gmail.com>
update change log and po files

Signed-off-by: xiehuc <xiehuc@gmail.com>
disable merge online history

Signed-off-by: xiehuc <xiehuc@gmail.com>
release 0.2d

Signed-off-by: xiehuc <xiehuc@gmail.com>
disable send visual on APPLE

Signed-off-by: xiehuc <xiehuc@gmail.com>
Merge branch 'upstream/preview' into unstable